I used the GoPro last season and while it wasn't the best quality, the footage was acceptable and it mounted pretty well to the snowboard using the adhesive clip. (The suction-cup mount did not hold as well in rough terrain). I just bought the Vholdr HD for this season but haven't used it yet.
The problem with both of the above is that you are shooting blind and can't check it until you view it on the computer at the end of the day.
With the POV type, you can view it on the small monitor while you are filming, but they are more expensive and you have the separate box and cable to deal with.
Personally, I don't like to invest a whole lot into this equipment, because the items get cheaper and better every year.