Me and my husband bought a GoPro 3 Black back in Feb for our honeymoon last March. We got great footage but the thing acted up on our trip. The remote wouldn't always sync with the camera and the whole camera froze completely we were white water rafting. It is cool watching the video but the camera itself is a huge PITA to deal with. Def not the most user-friendly camera. My husband still takes it on his mountainbike rides and has a love/hate relationship with the camera(one weekend he will tell me to sell the thing, next weekend he's asking for me to edit footage).
We still have footage I haven't even begun to edit.
I say if you have the money and do enough active stuff, it's cool. We have videos from our honeymoon that I'll forever cherish(NOT THOSE KINDS OF VIDEOS
If you are buying one for a trip...buy it a couple months before so you are more familiar with how the camera works before your trip.
ETA: Here is the only video I have from it on youtube LINK
This post was edited on 5/2 at 12:53 am