My GoPro work fantastic on my bow and or for hunting. It lacks a zoom feature but the overall quality is great. No worries if the weather goes south, battery life last longer than my 16gb cards
The only downfall, in my opinion, is that all the additional mounts are expensive. I believe they are roughly 60-70 bucks for whatever flavor you choose. However, once you get one or two different ones you can interchange the piece parts and make something that works in any situation.
Overall they are a lot of fun and I can about guarantee that if you get one, it's uses will stretch much farther than just hunting and fishing