Mixed review here....Very nice people, I was treated respectful, I liked the small town atmosphere and approach. Deal wise, I think it was ok (from my perspective), but the process took about 3 hours and 20 minutes. My frustration was that I called ahead of time, made an appointment and drove 2 hours, and it still took a long time. In total I dealt with 4 people, and when the 4th person sat down across from me and said,"Now what's your name ?", I about lost it. I was so frustrated at this point in time, I'm not sure I answered any of the question correctly, and I just hope the On-Star stuff is set up.
I'd would be willing to go through a discussion with someone from the dealer management team if there is interest in improving.
As a compare, I bought I Nissan 2 years ago. The complete process took about 1 hour and 15 minutes.