My buddy has one and fabricated a leather collar-mount for the camera to ride under the dogs neck. I agree with all the commentary as far as fish eye effect, no zoom, plus, once the dog slobbers it up a little , u cant see much. But what i love to watch isnt the bay and catch, but how the dog wearing the camera works. U can see him trail, wind, stop and decide which path to take at a fork, then when bayed, are they baying loose, tight, or busting the bay. Plus, if u dont wind up with pork on the wheeler, you can look at the video and see if, in fact, they were ever on a hog, and if they were, how'd they lose it.
This is why I want one. Once a dog hits the woods u may as well be blind. A garmin will give u insight like was previously unavailable. With a go pro a man can actually lay eyes on what's happening. If I could afford it I would have one on each dog even if I could only do it for one hunt.
So I would also be interested in finding one as cheap as possible.