Some folks say they can get good results, but I tried the Performance Spin Doctor and thought it was, quite literally, a piece of junk. The calipers had so much play in them in several axis, that I could never get consistent results. I think I could do a better job just flipping the bike upside down and using the frame.
I've got a TS2 now and although the self-centering feature doesn't work particularly well, otherwise it is a nice piece, and well worth the extra money.
- Mark