San Francisco, CA
Maybe 4.5 stars, they are not truly world class but they are tops for the area. I have worked near Cary Car Care for over a decade, taken my cars there for most repairs (and most maintenance/inspections). I have never had to take a car back for a repair to be redone. I have never had the car break again right after they fixed it.
I believe they've saved me far more than they've cost me over the years, by extending the useful lifetime of my cars through thorough maintenance and properly done repairs, and by accurate assessment of the car's needs. And from yearly inspections: when I get my car inspected anywhere else, they 'find' a problem. Cary Car Care only finds a problem if there's actually a problem.
They don't seem to be extreme experts; they are competent and can fix cars, that's all it takes :) Prior to moving to the Triangle, I lived in Cleveland. There, I had a more "world class" mechanic shop who really knew the cars, but, they also had more scare tactics and would talk me into fixing things that probably I could have let go a bit longer. I appreciate the conservative approach I get from Cary Car Care.