That's pretty funny... need to find that sign for my garage
Chevy dealer about 45 in north of here in Newport News used to have a "Vette Shop" that consisted of 4 bays and a Master Corvette Technician named Mike Arnold. It was the only place I've ever been 100% comfortable leaving my car (other than a performance shop). Mike would take the time to chat with me about my car and discuss the issues/TSBs etc. etc. that were in the system. He actually respected the fact that I knew the car inside and out and was coming to him b/c I had a warranty on it. I remember him saying that the real money is made by the guys doing basic lube/brake/service jobs and that the warranty rates paid to diagnose a complex electrical gremlin in a car like a Corvette (or any comoplex modern car) doesn't provide a very good return on the time invested.
I don't trust dealer mechanics because I've been around them enough to know the noobs are lazy and incompetent, they don't care enough to check torque settings or do a job w/o damaging the car. They only care about turnover and when working on a car that is someones prized posession that's not acceptable.
Before I found Mike's "vette shop" for warranty work I've had my car joyrided during a state inspection and the door edge chipped when the ***** pulled it on the allignment rack and just flung the door open. Little things like that have lasting effects.
Now I do everything on my own other than things where the tools to do it right cost more than the labor bill. But I also have go-to places that I trust and know how **** I am about my vehicles.
One thing I've found really helps when using a new place/dealer is to type up an outline of what you need done, why, and print the TSB out if applicable. When I got my truck after my grandfather passed I took it in to GM for a laundry list of things before the factory warranty ran out. I had an outline of like 13 items, the symptom/manifestation of the item, and the TSB printed w/ TSB number if there was one. I left that in the truck and showed it to the service writer.
When I got my truck back the tech and written "Thanks... awesome." On my outline/docs. The work was done correctly the first time around and everything was taken care of