Pep Boys off Scottsdale rd is the best one I've found throughout the Valley. They always have lots of people working so your car gets in and out of the garage fast.
My best advice is to sign up for the Pep Boys rewards program to get great discounts in the mail for your next service. I just had to get my starter replaced on my Acura and using my discounts I was able to get $100 off my service!!!!!
However, even if you don't have a rewards program or may have forgot your mailed discounts at home, they have a great coupon list on their website for everyone! Whats even better is they can scan the coupon right off your smartphone!