Never used a GoPro so can’t compare. Found the Contour +2 HD disappointing.
I never really managed to get the nice sharp images the advertising suggested were possible. Fiddled around with the settings a little to get better frame rates but it only ever got to being alright, never brilliant.
Mounted on the bike the video would jump about as if the camera was sensitive to vibrations and once or twice it stopped recording to the SD cards for no apparent reason. The cards were the recommended class by Contour and weren’t dodgy eBay jobbies.
The software for taking the video off the camera was appallingly bad. Really slow. I used a Serif video editor rather than the Contour crap. Had to keep the Contour crap to change any settings on the camera.
If I hadn’t dropped it getting stuff out of the car, I’d have flogged it.
Bought mine before Contour went bust, don’t know if anything improved after the buyout and re-release.