It's hard to tell if they do a good job or not because I was too busy declining services from aggressive salespeople.
I had previously purchased a $30 wax. They wanted to upgrade that to a better wax with a detail for $90 (with a "free car wash"! Guess what? If I'm paying $90-$120 the car wash isn't free). When I kept declining the self-described "great price" -- he lowered it $20. Then the guy asked me "how much I wanted to pay." This kind of cheesy insulting bartering should take place in the mercados of Tijuana, not at a neighborhood car wash. I was also offered a free windshield replacement with some speech about it not costing me or my inusrance a penny.
I will never go back. My wife will never go back.
I advise the rest of Phoenix do the same.