The rating should be below zero, here is why:1. Sound quality? The amount of noise generated is amazing in comparison to wired headset and wireless headphones (both non-microsoft) I've compared it with. If fact, noise seems to be the only clearly audible sound.2. No MIC ON/OFF switch - SIC!3. I've had troubles to make it working - it started working after installation of MS LIVE Messanger - what if I don't want to have it installed?4. Ergonomy - It does not exists. Too many wires as for "wireless" product. It took only a few minutes to make me tired just wearing it - even if I'm used to various ear-mounted phones (wired and wireless).5. I've asked my freind to try it - hoping that at least she will enjoy it. Do not do this to your friends unless you want to have enemies.