I have trusted sources that love both. I seem to favor the more compact Contour GPS and one wise forum member informed me of an app that will allow the bluetooth integration from camera to phone to let my smart phone serve as an external viewfinder. My primary hesitation is that I anticipate being in and around water whenever possible. I don't see the Contour GPS being water proof, merely water resistant. The Go Pro has a water proof housing that is good to a depth of about 200' or 60m. The Contour GPS is smaller, lighter and both have a wide array of mounts. Some Christmas gift money may be funding this fun filled toy. I've got fish catching to film, snowboarding girlies (and my own outings) and of course trips to the river/beach where I'll be in and around the water, rowing, etc. Your ideas? Experiences?