Best for my Weber E320 grill grates
348782
Have only used it twice so far, but it cleaned the grates on my grill spotlessly and left no staining or residue
499089
Item fit Weber Genisis grill perfect.  Much better that cast iron grates that came with grill.
3256563
Works great on my Weber Spirit S320. Combined with new flavorizer bars https://www.amazon.com/gp/product/B0031S9806/
and a good cleaning and the old grill looks and works like new.
4698435
I TOOK A CHANCE ON THIS BBQ CLEANER SINCE I DO HAVE SUCH A HARD TIME CLEANING AND STERILIZING MY GRATE.  I RECOMMEND THIS GRILL DADDY (THE ALL ALUMINUM VERSION) HIGHLY, AND IT WORKS AS RECOMMENDED.  THE GRILL MUST BE HOT SO NORMALLY I USE IT JUST AFTER FINISHING MY GRILLING AND IT ONLY TAKES 30 SECONDS TO CLEAN MY GAS GRILL TO MAKE THE GRATE LOOK LIKE NEW AGAIN. WHAT A GREAT PRODUCT AS IT REALLY DOES STEAM OFF THE STUCK ON MEAT ! !
906191
Grill grates fit perfectly and are very heavy duty.  These grates should outlast my grill.
932325
These grates arrived before promised, well packaged, and in excellent condition.  Please shop in confidence with this seller.

They fit perfectly in my 2013 Weber Genesis E330 Grill.  I just now installed these and a set of RiversEdge's stainless flavorizer bars.  These aftermarket replacements are substantial, and I will report back on how well they work for cooking.

The original cast iron grates have been shedding rust and look like they would not last the rest of this year.

Update on 17 June 2015:

Not only do these grates look much better than the original cast iron grates, they cook food much better, too.  I was expecting to have food stick, but that has not been a problem with these.  After cooking, I run the grill for five minutes on high, and these grates brush clean.
668033
Excellent purchase, best one for my weber gas grill i've ever made. It smells great when I use it on a still hot surface, and works like a champ at getting off the hard to get residues on the surface and in-between the grill ribs.
114740
I have had my weber grill for 10+ years and just replaced the grates. These are great. All food grilled evenly and they are easily cleaned.
3535102
I was using a flat stainless smoker box, but it seemed to go through damp chips too soon. The small v shape works fine on my ES 320 Weber gas grill. I bought two, and found that when I needed to add more chips all I had to do was swap them out. I also bought the long smoker box for some low and slow grilling. Plenty good when doing a rotisserie chicken.
35997
I've gone through three sets of cast iron grates on my Amana grill.  After two months of 2-3 times use each week, these grates are standing up nicely and clean with just a wipe down.  Really heavy stainless rods used to make these grates should last a long rime.
4912120
Works great, clamping option is what I use the most.  The magnets not as much due to the lack of SS in the metal surfaces near the grill.
4345179
Absolutely necessary for the Weber Grills. You do not realize the improvement until you replace the old ones. Most stores do not keep these in stock.
3322556
Best Barbucue brush I have ever used Cleaned between grates on my Weber just great Have spent almost as much at big box stores for ones that did not work and did not last
4265137
I bought the Weber grill with gas ignition and am thrilled with it.  The grates were a "sticking point" however and I quickly picked up this cast iron grate.  What a difference it makes!

I love the heat transfer and the beautiful and classic grilling lines.  The clean-up is also easier, but I've found that if I spray the grate with Pam before each use it becomes easier to reposition the food without sticking and it's also easier to clean up.
4404096
Works perfectly cleaning the porcelain cast grates on my older Silver-B grill.  Nice size, not too big or unwieldy.  No scraper, just bristles. My grates are quite old and except for a couple chips (my fault as I banged them together when cleaning) the brush does not appear to be damaging the Porcelain coating.  I should add that FAQs on the Weber site do suggest this brush for porcelain grates even though the bristles are not brass.
2456408
Very nice quality grates - did not quite fit, but workable, as my Weber grill is over 20 years old
3339779
The grates are very good. The space between the rungs are a bit wider than the original grates that came with my grill.  Any wider and hot dogs would slip through.