I used the GoPro Hero 3 Camera on an interesting hiking and pack rafting
trip in Cataract Canyon in Utah. Pack rafts are small, strong and light
single person rafts used with a kayak paddle. We were fully self
supported, so each person had, in addition to their raft, paddle and dry
suits, camping gear and food for several days lashed onto the front of
the raft inside a backpack. We started out hiking up Elephant Hill in
Canyonlands, getting passed by a few jeeps along the way. After a couple
of hours we veered off the main route and headed for our destination,
the mighty Colorado, just below its confluence with the Green at Spanish
Bottom, where we camped for the night. I had the camera strapped
conveniently on my wrist. It didn't take long to figure out  how to use
it. There was an issue with the 2 AAA batteries it requires. It required
Lithium batteries to function, which isn't a big deal once we figured
this out. SD Memory cards are what it uses to store the images and video
on. I got about an hour of video on a 2 Gig card, and carried 2 cards
with me, which was just enough for the 4 day trip. There are several
modes that you can shoot - video, still image, triple shot sequence
photos, photos every 5 seconds mode and self timer mode. You can also
choose to delete the last shot or all shots. Another nice feature of the
camera is the Auto Power Off Setting, which lets you choose 60, 120 or
300 seconds as the default time that the camera will automatically turn
off. You can also turn it off manually. The first thing that impressed
me with the camera is its small size. It is less than a finger by less
than half a finger by a little more than the width of a finger and it
doesn't weigh much at all. The waterproof case holds the camera nicely
with the two buttons easy to use and fully functional. The video quality
is about what I expected from a $140.00 camera, good enough to send
email clips or for the lower end of internet video.

A wider angle lens would be great to capture the closer in shots. I
tried shooting back at myself with the camera strapped to my pack on the
bow of the boat and the resulting shots where of my chest. In general
the camera functioned well and was easy to learn and use. I did not have
a chance to use the camera before the trip, so was relieved it worked out.

I was able to capture my mates getting wild in the small rafts on the
dark Colorado river. Being able to keep the camera on my writs at all
times meant that I had it ready to use whenever I wanted.

I had an issue with the camera occasionally coming unhooked from the
wrist attachment, which meant it flopped around and those shots are
worthless.

The battery life was good. I only needed to change the batteries once
during the 2 hours of recording time with several still images shot as
well.

Soon after the trip one of the clasps on the waterproof case broke,
eliminating the waterproofness of the unit.

If you are looking for a small, inexpensive waterproof video camera, the
GoPro Hero 3 is a great choice.