I've got a Contour Roam2 and a Contour Roam1 and in my opinion they're much better cameras than GoPro's, they're also about £100 cheaper, the Roam2 is about £150 from Amazon, but I'm pretty sure you'll be able to get it cheaper than that if you do some hunting.
The quality of the camera is way better though, and it feels a lot better when it's on your head, as it's less bulky, I think it has a wider FOV as well, the Contours is 170° not sure what the GoPro's is. The Contours water proof, which is always a bonus, it records both 1080p and 720p and it can record 720p at 60fps, to switch, you just plug it into your laptop and use the free software the camera comes with to change the settings. The Roam2 adjusts for low light conditions and high light conditions, so if you're in a building or something thats dark, and then look at an open door and it's bright outside, the camera will really quickly adjust to the light change, so you'll be able to see whats through the door, instead of it just being a gleaming white light.
I suppose the only 2 downsides to it are:
It has to be on the side of your head, because it's a cylinder shape as apposed to a box, so it can't sit in the middle of your forehead.
And it doesn't have a fancy smart phone app that lets you use your phone as a view finder, so you can't see what your shot looks like, of it's level. It does have a laser on it though, that shines out as a horizontal live, so you can make sure the shots level, so that kinda counter acts the whole not been able to see if the shots level.
They are the only downsides though, other than that the camera is brilliant, never had any major issues with mine, apart from the memory card randomly formatting itself, but that's also happened to my mate, who owns a GoPro