I remember getting service there once, the service manager and master tech came out on a ride with me in my car so that I could demonstrate my problem. All the while both of them were jumping all over me telling me there is no problem and it was all in my head. Yup in my head.
Went to another dealership within about 20 minutes of there, they instantly diagnosed the problem just from my description (not having looked at the car yet). Had it fixed for me by the end of the next work day and I was on my way.