I would have given the dealership a 10 except for the fact that getting the car to me took longer than I thought. I did not have a car at that time so it was very inconvenient. They did give me a rental at no cost to me which I did appreciate.
I have a transmission shimmy in my 2017 Corvette (10000 miles). Copeland was unable to diagnose the shimmy. I understand it's difficult to find, but it still shimmies.
I am not going to rate them at this time.