One thing I'm a bit annoyed by is the fact that the ear pieces are exactly the same, but I remember specifically that my left ear canal has a pronounced bend that the right does not. I think they may have lost one of the ear pieces and used the left impression to make the right ear piece. They really are mirror images of each other, and this should not be. After using them for an hour, it is clear to me that the fit in the right ear is not quite right - it does feel rather congested after awhile, so my previous post was made in haste. I've already sent them back once because the colors were way off, so I don't know if I ought to send them back yet again...I guess I'll use them for a couple of weeks and see how they feel. As of now, I do feel like something has been in my right ear, just a tinge of an aching feeling while the left feels normal.