I'm surprised by these reviews...lots of shady mechanics in Phoenix metro. Dave and crew is not part of them. They're really busy Saturday, Monday and Tuesday, all the time, 7am to 6pm. What does that tell you about a garage's rep?
I've seen the front desk guys fix things on customer cars that would take a minute, for free..busted fuse one time from a 12v lighter gadget. I've recommended quite a few people to this shop and never had a complaint.