I've used these for a whole season now and am really happy with them. Some have mentioned they seemed a little heavy, and for XC i would say they are, but for and AM, freeride, or DH riding these are perfect. I've ate it a couple times and the fabric didn't rip or tear and the are very comfortable and breath well. Got them on a good sale which didn't hurt.
The strongest mount you can buy. I originally got one of these for my bike handle bars, and one day it occurred to me that I should bolt one of these to my helmet visor so I don?t have to worry about the sticky mount breaking loose (which had happened twice to me, luckily I found the gopro). Awesome product, glad I stumbled upon it.