My dealership experiences:
Bought a Nissan Maxima from the Toyota Dealership. The GM of used sales at the dealership was our next-door neighbor; I'd been babysitting his kids for about 6 years at that point. They treat us right over there, but then again, they treat everyone right.
Got a SAAB 9-5 from a one man used car lot. The guy was a stand up individual; even though the car has caused us a lot of hassle, he did everything he could to help us figure out the warranty. I still look at what cars he has for sale every now and again, and I check every day when we are seriously looking for a car.
Test drove a Miata at an Acura dealer. They all kept trying to get me to test drive a brand new Acura even though I was only 20. The salesman who helped me with the Miata was kind and respectful; the one who was trying to get me to drive the Acura got all pissed when I compared the car to the Honda variant (Crosstour to ZDX?)
Stealership experiences:
Test drove a Miata at a Chevy dealer. I wanted (at the time) a 5 speed. It said 5 speed, I didn't know that LS meant 6 speed at the time. Drove it, found out it was a 6 speed, and took it back saying I wasn't interested. The salesman told me that the 6 speed was better, faster, with better gas mileage, etc. etc. Uh huh. He also told me that it was normal for it to grind while shifting into first.
Test drove a BMW 525i at a Bentley and luxury used car dealership. This one takes the cake. First of all, the car had been in an accident, and we think a flood too. We ask about this and they say "oh, no, that is just left over interior cleaner". Right. Well, we try to leave, but they have valet parked our car (apparently, a Crown Vic next to their precious Bentley's isn't good for business). So we wait for them to go get the car, and this sleaze ball (because really, there is no other word for him) is trying to get us to look at umpteen other number of cars "this is a great car", blah blah blah... No matter how many times we tell him, If it isn't stick and RWD, we aren't interested. Aside from this, it felt like the place was run by a middle eastern mafia.
I got home and looked up reviews of them on the internet. Apparently, the police won't even deal with any of it anymore, they have the lowest rating possible from the BBB, and is generally the reason for the nickname "stealership".