This is easily the best bluetooth headset I've used. I use a cell phone in my home office all day, and I need a headset that sounds very natural and as close to a land line sound as possible. This one delivers that, with very clear sound on both ends.  It's also the lightest one I've used, and it's very easy to wear it all day without discomfort. It also doesn't drop connections with the phone (a blackberry).  I've used a jawbone (sounds like it's a shortwave radio transmission), nokia bh-900 (clear but very uncomfortable for all day use), and a half dozen others in the last few years, and the others don't come close.  I also like that it comes with additional ear loops, but I doubt I'll need them since the earloop seems sturdier that the little wire loops most headsets come with, and I won't be carrying it in my pocket due to discomfort.