Sure, it can be helpful to know which Crappy Garages are actively ripping off consumers, at the moment.
But the fact is, the owners and managers, and "advisors" change all the time, so you never know when a once-trusted location (there must be SOME, right?) is going to suddenly go down-hill.
Best to send out an email or Facebook comment asking your friends and co-workers to share their recommendations. I'll bet Crappy Tire won't be on anybody's list!
I've done this for mechanics, as well as plumbers, dentists, optometrists and roofers. Start leveraging Social Media!