I have used three different types, and found this to be the most easy, innovative, and reliable... as well as quality, and it is a bit cheaper then the average. What I like is, they wire a button that sticks out of your skirt so you can press record from it, and it has an LED on it to tell you when you are recording. I used to have to just press record and go, which wasted a lot of tape, and battery. Also, the clear case allows you to see the screen on your Camera, to visually see how it looks while the camera is in the box....
Here is the link on a review
http://localpaddler.com/news.php?resource_id=2116
Hope this helps, this is truly the best I have seen, and easiest I have used.... And least expensive....
Ben Guska