I'm sure my T's have, as most were students or in a clinic practice where they are expected to discuss their cases in weekly supervision or clinical meetings.
I like the fresh perspective personally, as I know I'm a pain in the *** client.
The only time it has gone poorly for me was during a bout of several hospitalizations. I think my T at the time was sick of me, and eagerly jumped on her supervisor's suggestion that I was too much of a liability, and she should terminate. Every other time, i think it gave my T a chance to brainstorm and think out loud about how to proceed...