We purchased this to replace our trusty Genesis Silver B with cast-iron grates. After 10 years of frequent use, I was looking for something with more flexibility and capacity. I also had grown tired of the rust issues with the cast iron grates (yes, I know about 'seasoning'), but wanted to retain the high heat advantages that cast iron offers. The Summit S-470 has more than met my expectations. If you plan to feed a small army, consider the 600-series, but for most backyard uses the 400-series has *plenty* of usable grill area.
Key advantages:
* High-quality stainless construction. Unlike the lower-cost Weber grills and virtually *all* of the competitive alternatives, the Summit grills are made mostly of 304-grade stainless steel. This has much higher nickel content, and as a result is substantially more corrosion resistant (and more expensive). The easiest way to identify cheap stainless is that it is magnetic (so take a magnet when you compare grills). Improved corrosion resistance means that the exterior will remain beautiful for years, and the grates will last indefinitely.
* 7 independent burners on the S-470 (in addition to the side burner). Four main burners, one searing burner, one burner for the built-in stainless smoke box, and one infrared burner on the rear cover. All except the infrared burner run front-to-back. With most of them active, the grill reaches >700 degrees F in ten minutes. This provides incredible flexibility. Extremely high direct heat, completely indirect heat, crispy skin on rotisserie, lots of smoke at low heat, only part of the grill at high heat, etc... - no problem. You are limited only by your imagination, not your tools.
* Extremely thick (9.5mm) grates provide excellent searing and heat retention. These work at least as well as the cast-iron grates on our old grill, but are much easier to maintain.
* High double-wall lid. This makes the grill space under the warming rack actually usable! The double-wall substantially improves performance in cold or rainy weather, and requires less gas to keep the grill hot under all conditions.
* Pop-up rotisserie. It is extremely easy to use, and quickly folds away in a weather-protected stainless pocket. Other thoughtful touches include obvious hanging storage areas for the spit and spikes in the cabinet.
* Rodent-resistant cabinet. The cabinet has double-walled doors with secure magnetic latches, lots of ventilation, and no gaping holes.
Issues:
* Very Expensive. Even on sale, the S-470 is about 3x the cost of a Genesis grill. Only you can decide if the extra flexibility is worth the extra cost. In our case I expect to get 15+ years out of this grill, and the cost is comparable to some good-quality kitchen appliances. However, the very high cost is the main reason I give this grill only 4 stars.
* Side burner has limited heat range. Presumably to prevent blow-outs that would cause safety issues, the range on the side burner is only hot to very hot. Simmering at low heat is basically impossible. For my next trick I plan to try adding a thick solid burner plate, but for now the side burner mostly does not get used.
* Lighted controls are mostly a gimmick. Fortunately they are LEDs, so corrosion should not be an issue and the batteries last for many hours. However, the lights only work on the four main burner controls, and are irritatingly bright when you happen to glance at the gap between the knob and the cabinet while reaching for the control. I added some white shrink tubing to the end of the LEDs to eliminate the latter issue, but overall the lighted controls offer limited benefit.
* Several other reviews mention a design flaw in the Summit grills which allows rainwater to flow from the back of the grill into the grease pan (making a big mess in the floor of the cabinet). Fortunately there is a simple fix. On our S-470 I put an aluminum flashing on the rear of the case using one of the bolts on each end of the grill box, similar to the way Weber handles water flow on the front. A 12" wide roll of aluminum flashing was only ten dollars at Lowes, and I cut it with scissors to fit. Now even if I forget to reinstall the cover, no water drips into the grease pan. This is not an issue with the Weber Genesis grills because the lid design is completely different (but one of the trade-offs is much lower interior space). Weber really should make something like this a running production change.
* Do *NOT* buy the Weber-brand grill cover. I like most of Weber's stuff, but their covers are very poor quality. Buy the Veranda BBQ Cart Cover instead. The 'Large' size fits the Summit 400-series perfectly, and the construction and design are far superior to the Weber covers.
Other considerations:
* These puppies use LOTS of gas! I am very glad that we were able to easily pipe natural gas to a convenient location. I can hardly imagine how fast we would be running through propane at >3x the cost!!
* If you are evaluating the stainless Genesis models, you really should consider the S-450 or S-470. The construction is substantially better and the finish will be much easier to maintain. Basically I would recommend sticking with the less expensive porcelain models, or stepping-up to the Summit grills. In addition to better materials, the front-to-back burners offer much more flexibility and control, and the side table is not covered with knobs.
* Check pricing. I buy a lot of stuff at Amazon, but we were able to find this grill for substantially (~20%) less at another reputable online vendor.
* The natural gas hose is quite thick and heavy, is apparently armored inside the PVC exterior coating, and comes with a good-quality brass 1/2" quick-disconnect. The connector on the end of the quick-disconnect is a female 1/2" IPS thread (i.e., standard steel pipe thread), so you need a male 1/2" IPS thread on the end of your supply line. Be sure to put a "O W G" (Oil/Water/Gas) rated ball valve immediately before the hose connection, and only use pipe dope or Teflon tape rated for use with gas.
* In California, galvanized pipe is *required* for outdoor gas use. According to PG&E, the western gas supply has very low levels of sulfur, so the old concerns about flaking and corrosion inside galvanized pipe are not an issue here in California.
* For rare situations where you need more grill capacity, consider the relatively inexpensive Rib-O-Lator. This is essentially a ferris-wheel with stainless trays, and will hold an amazing amount of food (and still leave parts of the grill available). There is at least one Rib-O-Lator (or Rib-O-Wheel) YouTube video with the Summit S-470, and the tall lid clearly helps. We use it mostly for ribs (surprise!), and ours fits easily inside the bottom cabinet when not in use.
* Not 100% made in USA. Several of the boxes inside the crate were clearly labeled "Made in China," including the rotisserie and both tables.
* Remove the door handles and the doors from the cabinet before removing the protective plastic coating. The doors snap-out easily if you depress the top pin, and the plastic coating is much easier to remove completely if the handles are not in the way. Each handle is held on by two Phillips-head screws and is very easy to reinstall.
* The crate weighs about 260 lbs, but if you remove the various boxes from inside the cabinet and fire-box, two people can remove the shell from the pallet. After that, you can easily roll the grill on any hard surface, and assembly is straightforward. The most tedious part of "assembly" was removing the protective plastic coating and collapsing all of the cardboard debris.Updated July 2010
We use this grill about two or three times a week, and remain very happy. I would definitely buy this again. I've added some photos to illustrate the modifications referenced in the original review. Note that if you regularly use the smoker, the exterior stainless will inevitably get discolored near the right-side and front edges of the cover.
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Weber 2840301 Summit S-470 Natural Gas Tuck-Away Rotisserie Grill, Stainless SteelProduct Description: Weber Summit S-470, Stainless Steel, Natural Gas Grill With Tuck Away Rotisserie Motor, SS Enclosed Cart With SS Doors & Chrome Plated, Cast Aluminum Handles & Accent Colored Painted Side And Rear Panels, 4 SS Burners, Primary Cooking Area 468 SQIN, Warming Rack Area 112 SQIN, Total Cooking Area 580 SQIN, 48,800 BTU Per HR Input Main Burner, 12,000 BTU Per HR Input Flush Mounted Sideburner,10,600 BTU Per HR Input Infrared Rear Mounted Rotisserie Burner, 10,600 BTU Per HR Input Sear Burner, 8,000 BTU Per HR Input Smoker Burner & SS Smoker Box, 2 SS Work Surfaces, Lighted Control Knobs, 6 Tool Hooks, Includes Weber Cookbook, Limited Warranty,10 FT Flexible Hose Included.
Buy cheap Weber 2840301 Summit S-470 Natural Gas Tuck-Away Rotisserie Grill, Stainless Steel now Get 18% OFF
I received a grill for xmas, this reminded me of the gift I wanted so badly! It is so cute, it opens and closes, great quality.
After extensive research and despite less-than-exptected Consumer Reports ratings, I chose to purchase the 2007 Weber Summit S-450 grill.I own a 5-year-old Charbroil that is bowing out and losing heat/smoke when I cook so I wanted a multi-fuctional grill to replace it that would last longer.The Summit S-450 includes a beautiful smoker box with a dedicated burner and a Rotisserie Kit.More importantly, it is a Weber, which means great warranty and customer service and built to last.
This grill has it all, six burners, a side burner, a rotisserie with infrared burner and a smoker box with a dedicated burner.The grill grates are 3/8" stainless steel rods that provide great grill marks on your food.The grill heats up to 600 degrees in less than 10 minutes, but it does burn through propane rather quickly, but that wouldn't be any different with any 60,000 BTU grill.I was able to put the grill together by myself in a little over an hour.The fit of the pieces was fantastic and the end result was an attractive incredibly stable grill.It has two pull-up counters with stainless steel inserts, and a cabinet with stainless doors.
I purchased the Cuisinart CGG-200 All-Foods 12,000-BTU Tabletop Gas Grill over a year ago and later, added the portable stand for the grill.I have been very pleased with both.Why then, buy the charcoal version?I'm somewhat of a charcoal fanatic and food grilled over lump charcoal just tastes better in my opinion.I have read reviews of the grill on Amazon and decided that if I was going to purchase it, I might as well get the stand and the cover at the same time. Out of the box, the grill is very easy to assemble and takes only a couple of minutes to set up.
I had to cancel my order when Amazon kept pushing my delivery date back. I still bought the genesis gold B from my local hardware store.It cooks great and has all the features I was looking for. It heats up and is ready to cook in a couple of minutes. 
Perfect grill for two of us now that the kids are out on their own!
I am very happy with this grill.I've had other Webers and this is by far the best.It has a large cooking surface for feeding large family get-togethers.I can get it extremely hot for searing steaks just right.But it also does what all my other gas gills couldn't do- it lets you cook low and slow at about 200 degrees!When I first got the grill I seasoned a whole chicken and put it on all day, using just the small burner on the smoker box- virtually forgot about it for hours.Later that evening it was tender and juicy.
Agonized over whether or not an expensive grill was worth the money.I call it expensive since you can get the same size for nearly half the price at a retail chain.I'm not agonizing anymore.I have used it for three weeks now and the kitchen oven is getting jealous.We cook everything on this grill.Today, we finally used the rotisserie for a whole chicken and it was the best we've had. Fish, steaks, chicken and pork all grilled to perfection - and fast!
This is the Ferrari of Grills! everything you need, smoker, rotisserie, searing station, side stove burner and 6 grill burners. It's just the best, I have been using it for over a month now, and I can say it the best grill I have ever owned and will ever own. 
This is one solid grill.The panels, grates, double walled cabinet doors, side shelves all are robust in materials and design. The assembly was minimal, I had it together in 15 minutes.At first I thought the handle lamps and lighted panel were gimmick, but actually are very functional. At 70K BTU, this grill packs a mean punch. It zoomed up to 700'F in less than 10min, so cleaning this afterwards is a breeze. My first use were two 2lb chickens on the rotisserie; the S-670 performed gallantly. If I were to pick a weak spot, it would be the caster wheels; they are a bit on the light-duty side especially when compared with the rest of the grill. I suggest registering warranty by phone, the customer service rep will share with you use and care instructions not as obvious in the manual.
I bought this grill from Amazon and in short everything worked right out of the box.I bought the grill so that I could sear steaks, grill for a party and cook BBQ low and slow all in one grill.I have had nothing but success, great grill marks and I am able to maintain a 230-250 degree temperature for BBQ (with smoker box for great flavor).The six burners plus the smoker burner and wide cooking surface allow me to tailor the temperature perfectly.The setup instructions were clear and I was able to assemle it myself.I am very pleased with my purchase of the Summit Gold D6 and knowing Weber will be around for as long as I will own this grill as also very reassuring.
Before I purchased this grill I was looking for the Char-Broil Fire & Ice Grill (the one with the cooler below); however they have discontinued it for some weird reason.So I researched this one for my tailgate and decided to give it a try.I normally use charcoal however it is such a mess and the smoke blows over into others tailgates which is a little rude.
This BBQ grill is quality. It's sturdy and feels like it's going to stick around for a while.
Ducane has been making notable grills for decades.A few years ago, the company was bought by Weber.For a mid-priced grill, this is the one to go with.Burners and grates are Weber standard.Outside, thinner steel and a few minor short-cuts bring the price point down, but still far superior to a Char-Broil or Brinkman class grill.Heat is even. Porcelain coated grates. For about $300 less, you get the heart of a Weber.And for those of you who hate cleaning stainless steel, another plus.
This is the best/last grill you'll ever buy. 
For reference, "old tanks" will refer in this review to Weber "quick connect tanks."
The quality of the materials and construction of this cover is pretty good, and it will do an okay job of protecting the grill. However, with a few modifications, this cover could have been significantly better.
Summary: Easy to assemble, easy to start, great grill marks, easy to clean, size is medium (4 steaks or 12 thighs) seems small till you open the lid.
the small screw on tanks work very well. But when using the adapter hose on a 20 lB tank the flame is too weak to grill, especially when the outside temp is in the 40s or lower.