The other day it was jammed. I gave it a firm twist and it came free, but I could feel it was tight from 12:00 to about 8:00 (counter clockwise, of course), then turned loosely back to 12:00. A day or two later it was turning very loosely all the way around the dial, and had developed quite a bit of "slop," almost a full second either way. I figured the bezel spring had broken.
It's still under Watchbuy's two year warranty, but I wasn't looking forward to shipping it off for repair.
Today I put it on, gave the bezel a turn, and it's just fine, maybe even a bit better than when I bought it. I guess something got jammed up in there, a piece of grit or something, worked itself out, and now I appreciate why Sinn keeps their bezels a little "loose" for just such situations.