I had very good experiences every time I took a car here, back during a yearlong stay in Phoenix for work.
The mechanic/owner of this small shop is one of the best I've found in Phoenix. He was honest, the work was done quickly, his charges were reasonable, and I've never had a problem with any of the labor or parts he used. I had him fix belts, seals, radiators, you name it, as my car needed quite a few repairs (it was a used fixer-upper).
It's a shame that I no longer live anywhere near this place, or I would definitely use it for any future car issues. I'd recommend it if you live on the North side and want a reliable, cost-effective mechanic.