I'm not promoting Midas over other shops, but in this instance, look at how well maintained this store is.  Sign in good shape, bay banners are nice and fresh, bushes trimmed, etc. That's a good start.

How to Find a Good Mechanic or Auto Repair Shop

A 22-year veteran of the industry provides techniques for finding reliable and honest auto repair for people who are NOT mechanical. If you know what to look for, you can find a safe place to take your car, or at least drastically improve the chances of having a positive experience.