I have a Gopro myself. As far as quality goes resolution is relatively equal. The biggest difference between them all is the image stabilisation, battery life and accessories available. As far as accessories I can confidently tell you Gopro is the winner. I love the stability of the Gopro and I have quite a few accessories for, helmets, bike, 4wd, diving and boat. If it is just the camera quality you are after and not all the bells and whistles have a look at the Sony. Awesome stuff too.