Yeah, I bought one, seems like a good piece of kit and does what it says on the box. Paired with my Zumo 340 with no probs and also my iPhone for music etc. Nice and clear Bluetooth reception, in fact I had to turn down the volume as even at (legal) motorway limits it was too loud.
One slight problem was that the right earpiece cable was about an inch too short to run under the headliner in my (XL) helmet, but a minute or two with a soldering iron and a recycled cable from an old pair of earphones did the trick.
Didn't fit the microphone though 'cos i won't need to use it on my upcoming European adventure