I bought 3 different periods:
1 for me in July 2011 and two others in September 2013 (one for a friend and one for my girlfriend).
3 still working fine and allowed me to play or chat online with no problem.
My interlocutors hear me clearly.
Very good product I recommend (as "recommend" and under "order again") without worry!
It works perfectly under windows xp, windows 7, ubuntu (after a little manipulation) and mac os X.
EDIT: the headphones are directly recognized and running on Ubuntu.
My "problem" was because I was using a version of "no installation" of Linux (directly from a key).
I therefore reconfirms: great product!