I have a contourHD and it worked pretty good for skiing. This seems to be ultra awesome. It states that it takes multiple readings per second, which is better than any other sports GPS device I've come across, which seem to at best take one point every second.
To see gps data overlayed with live video just seems awesome. If it's truly fairly accurate, you would be able to see at what points you achieved certain speeds at and at what points during skiing was the steepest terrain, etc.