Went to Rock Bottom with a large party - about 50 people. They were very accommodating. The servers were both friendly and helpful.
The food: I had the pulled pork sandwich. It was very good with a little bit of zing to it. My teenage daugher had the mac and chicken and loved it. Someone else in our group had the Kobe sliders (listed as a starter) and said they were great. If you go, get the ball park pretzels - great dipping sauce.
The beer: Great choice of beers. We had the Beligan White Ale and it was outstanding. Went down real smooth - too smooth. Finished off a couple of pitchers in the blink of an eye!
The atmosphere: It is a fun casual place. It wasn't too noisy despite being pretty crowded. The bar area has several TV's.
The prices: Prices were reasonable.
The service: Service overall was good. One table of our group didn't get their food for over an hour. While that was not good, the manager took care of things once it was brought to his attention and provided them with free desserts.
I'm not from around Phoenix and have never been to Rock Bottom before, but if I'm back in the area, I would return.