I have been taking my car to Hi Tech for 5 years for inspections, oil changes, brakes, etc., and these guys have always treated me courteously and fairly and they never charge more than the quote (I appreciate that after having been charged more than $800 over a quote by a dealership mechanic once).
Things are going to go wrong with your car. These guys always explain exactly what the problem is, give me all the options, and allow me time to call my dad to ask if a quote is fair before proceeding.
I'd give them 5-stars if they offered a few of the perks my old place offered before I moved--such as pick ups and free car washes. But that was a small rural town and I lived a block away from the garage.