Honesty. This is what has kept me coming to Scottsdale's Car Repair Company for the past 3 years.
I own a late 90s Japanese passenger car, so I'm not a frequent visitor of the shop. Every time I do need work or want to take it somewhere I feel confident in the labor, I come on back.
Turn around time is very good, an oil change will usually take around half an hour and is moderately priced. They have won numerous awards for excellence which are displayed in the office.
The staff is accommodating and pleasant. The owner is usually present in the shop as well. If there is extra work that might need to be performed while your vehicle is being serviced they will contact you before the work is done or parts are ordered to verify you want the work completed.
They offer a shuttle service for major work (read: not oil changes), which is great if you can't talk someone into driving you around. And if you do have to wait there are a few restaurants around the area you can walk to and relax at. (if you're adventurous you can walk about two blocks west to TT Roadhouse for a drink)
Overall the shop is clean, the service is timely and the price is reasonable. If you're looking for a car shop in the south Scottsdale area, look no further.