It's like I'm nudging it around on the hole (the pin by which the fork attaches). The cups rotate perfectly and don't squeak at all when rotated or while I'm wearing them tho.
Was listening to a podcast today while walking and they isolated pretty well without any undue noise. I think I may be wearing mine a bit looser than some. I don't see how you could reliably go running with these things (not that I'd want to, just something I've read others have done).
My ears must not be very sensitive or I haven't worn them long enough because I found comfort to be pretty good out of the box. I mean I've worm more headphones (my Beyers, or even the Philips Downtown), but I can easily live with the M-80.
Edited by Impulse - 12/10/12 at 7:48pm