me one of these for christmas, anyone had any experience ?

Looks a little unweildy to some of the others on the market, but never having used a helmet cam I cannot really pass comment, I saw the one marketed as the tony hawk one and that looked quite nifty...not sure about the specs though.

Ive been using an Archos 405 with a camera, have had no problems with it. Also doubles as an "ipod" only snag it's not water proof.  If I was any good at this tech thing I would show you some footage. Try Currys they do some package deals unit and camera not cheap about £200 but you get 30gb memory. I have used it to film the last downhill at the Selkirk Merida.

Jeeez that's some of the best MTB footage I have seen.  Those 'Flyin' Brian' headcam films are insane.