Breakage

I agree with other reviews. I've had these for about 2 months, and I'm already on my 2nd pair (the first ones cracked in the middle of the headpiece). I will say that I didn't have any difficulty getting a replacement headset from Logitech.

The sound is OK (there's not enough treble for my tastes, but that's a very personal thing). It is a joy to commute on the NYC subway with my iPod in my briefcase, and no wire coming out of the headphones. The Bluetooth does drop occasionally. I've also found there are certain spots in my neighborhood which seem to have a great deal of interference.