The only bad experience I've ever had was with a girl who honestly and literally didn't know what to do with her hands. She was yanking and pulling like she wanted to rip it off. I asked her very politely to stop, and suggested she try using her mouth, instead. Needless to say, things instantly became much more satisfying, so to amend my earlier statement, actually my experience turned out only half bad. And the good outweighed the bad, immeasurably.
