Only been able to use it once, but the quality of video seems amazing!
Just built a shelf that will be used to mount the camera in my Ice huts to (hopefully) get some great shots/action through the ice!
One thing that is a MUST is a high quality SD card.
I tried it with a class 4, 8 gb card and it was quite choppy. I just bought a new ($120) class 10, 32gb card and that fixed the issue. With true HD video, you need a super fast card in order to keep up with the writing speeds needed by the GoPro's.
You'll love the camera though... honestly. They are amazing.
I'm still TRYING to convince the wife to let me get a 2nd... LOL