When I seen these I thought "I'll give these a try, I have the Anycom BT headset which works fine but, I don't like the behind the head fit, so I got this one. When it arrived I charged it, paired it with my phone and PC. WORKS great. Sound quality is excellent, callers can hear me just fine. After about 7 months of daily usage the hinge on the ear piece broke. I had registered the product (highly recommended on any product you buy) with Plantronics and called them about the problem. GREAT customer service. I asked what my RMA# was and was told " You don't need one. We will ship a new pair out to you today" 3 days later I had a new headset, with return postage to plantronics included.PROS: great works with everything I have. It comes with a Gateway device that you plug into your MP3 player (mine is a Zune 80GB and I love not having any wires attached. I can walk around my house and have yet to lose signal).CONS: plastic but they are improving. Ear pieces get worn down after a while. Signal is lost at times next to my PC for no apparent reason (I beleive this is a Windows problem dealing with the BlueTooth stack)The issue with the ear pieces was resolved by plantronics when I called to see if they sold replacements, which they do. I do not know what the cost on them are, because plantronics sent me two pairs (4) at no charge. Good product. So good I have a new pair still in the box just in case......