The background noise on this drove me nuts, so had no choice but to return it when I bought it from Buy.com last year. If you can tolerate the background noise (there is no way to turn it off), then this headset is great.
Edit: I almost forgot, but yeah, as one of the above posters said, this headset can also cause an echo. I was able to correct it by moving the mic far from my mouth and headset, so unless you speak really low, it shouldn't be too much of an issue.