Michael,
I use a Contour, sometimes mounted on the wing strut, at the jury strut, and sometimes mounted inside in the upper port side of the cabin (where I can turn it on and off). However, on this flight, as I sometimes seem to do, I forgot to turn it on!!! So all these shots were taken by my wife on her iPhone. My opinion is the GoPro is a much better camera than the Contour. I just happen to have a Contour. I own part of a high end drone manufacturing company that makes helicopters and quads for agricultural and military applications. We use GoPro blacks on most of those aircraft. The GoPro does an outstanding job. That would be my first choice.