I've owned several Bluetooth headsets, including the much hyped Jawbone (mine went thru the wash in a pants pocket, unfortunately). I must say the Series II JX-10 is the best yet. Sound quality is far better than the Jawbone (and it costs less, too), the size is just about perfect, and it looks cool. I think it's much more comfortable to wear than the Jawbone, too. The Series II apparently has a more robust earpiece than it's predecessor, and it seems plenty sturdy. So far, Im impressed. I just need to be sure not to launder it!PS They say it comes with a carry-pouch, but I didnt find one in the package. No big deal.