My GoPro Camera's have taken countless beatings and still work great. The housing around the camera will be the first of anything to go if you take a spill.
After playing around with the camera for the first couple of times, you get a sense of the angle your seeing. The fish-eye lense gives you a pretty big spectrum. If your looking to use it for skiing, id defiantly consider getting the chest mount harness and the pole (purchase at eyeofmine.com)