If you work in a noisy environment or need something really lightweight or wear glasses, then this is the perfect headset.  It is light, almost featherweight, sounds great for both incoming and outgoing, and comes with an array of charging options.  The only drawback to it is the button and how hard it is to press.  Other than that, I would have to say that this is a perfect headset and Plantronics has made a believer out of me.  The DSP works in reducing background noise.  It does not however, remove it completely, which may or may not be a good thing.  But the fact that the other party can still hear you clearly when you have your windows rolled down says a lot.