I have had my car serviced here for the past 3 years, absolutely outstanding service. I highly recommend Audi North Scottsdale over Audi Chandler due to previous bad experiences at Audi Chandler and very consistent satisfactory experiences here.
For sales, talk to Brian McCauley - he's also the president of the Audi Club of North America Arizona Chapter and a fellow Audi enthusiasts who knows more about Audi then possibly anyone else in the state. He's also very low pressure, friendly, and awesome to work with.
For service, I work with Al Rizzo who has also been great to work with. My car has a few modifications done to it and they don't give me a hard time about it with my CPO warranty.
I'd highly recommend Audi N Scottsdale to anyone needing either service or a new Audi, they're the best!!