The reason I am posting is that I have been able to trial a sample pair of the Mi-Sport VBT.
The music quality is very good using the built in mp3 and via bluetooth streaming. Excellent bass and call quality is great with adjustable volume. The voice navigation is very cool. All music has to be put in albums or playlists and then that playlist is read to you in your pre chosen voice/accent. You can then scroll playlists, tracks and rewind or fast forward within tracks. No screen but it`s actually better that way in the gym. No problem with bench press as the band around the back of the head easily slips into the nape of your neck.
It is a very intriguing product as it does not really lie in any one market. It`s a waterproof mp3 player for swimming, or wireless headphones using a dongle [listen to TV whilst on running machine], or bluetooth headphones for your phone. Very adaptable, especially for exercise. I think they will price around $159. Will get one definately when they ship.