Wilhelm had the friendliest counter people I have met in Phoenix. The service guys also came up to chat and were super friendly and knowledgeable. If I lived in the Phoenix area I would certainly choose these guys as my repair shop for everything... but sadly, I was just passing through.
I have told all my friends and family in Phoenix to check them out, though. Great company with a good customer service oriented staff, and it was begun and has grown all with a local family native to the area! How cool is that!?!