I don't offer a review of an auto shop lightly. This one deserves it.
About 5 years ago I needed a mechanic and a coworker told me she was friends with one of the owners of this place. She said he was a former Indy 500 mechanic and ran a slightly higher-end operation, but that he'd never rip me off and won't screw up my car. I went, was pleased, and have been a bunch of times over the 5 years since and remain pleased.
[Note: Their website makes no mention of someone having Indy 500 experience, so I don't know if my coworker was imagining things or not. That's just what she told me.]
Its highest marks come for this consistent feature of every time I've been: they'll give me an estimate (and may charge for the estimate, be pre-warned; I recall paying 20 bucks for them to find out what was wrong with some electrical wiring), I'll accept it and give them the green light to start work, and when they call me to tell me the results it has ALWAYS been slightly below the estimate. Whether or not this is part of a deliberate goal of theirs to slightly over-estimate costs in order to never surprise the customer, I don't know. All I know is that I appreciate knowing ahead of time to the best of their ability what I am in for, and then actually having to pay no more than that. I really, really, really appreciate that.
Two other reasons for the five stars: location (downtown), and their free shuttle service to and from (as far as I know) anywhere in the Valley. They have a dedicated van for this purpose, with a dedicated driver, who happens to be an ol' coot who's lived in Phoenix for 2 centuries and will tell you everything you've ever wanted to know about the history of downtown Phoenix and/or why you should never get married.