Ok, I'm the odd one in this bunch about dealerships, maybe it's from the fact that the dealership I have been going to for the past 5 years, has taken care of my Z, under Nissan gold preferred maintenance plan, that ran out in January this year. Have not experienced any problems, always did what was required, didn't try to sell an extra services. It just worked. Also I have been working with the same Service Rep, the entire time.
They even installed my Zspeed clutch kit that I purchased, and I haven't had any problems.
guess I'm a little odd..