My experience with Zia has been great! I had taken my Mercedes here to diagnose a problem 4 months ago. When they couldn't find what it was, they didn't charge me at all for trying. I took it in for servicing this week, and they were prompt in calling me with inspection findings, letting me know all the accurate information, and completing everything timely. I was really impressed with the emailed report how they took pictures of sections of the maintenance inspection points - it gave me confidence they not only completed everything but were honest in the assessments - impressive feature for sure. Shawn was incredibly nice and informative when I took the vehicle in for diagnostics. Joe was great completing the service agreement. I will continue to use them if they stay competitive with dealership costs.