Great camera, very good image quality (compared with gopro hero3 withe) rather complete functions (compare gopro hero 3 black). wifi is great autonomy 1h30 tested recording (Sony is a manufacturer of batteries and it feels) the housing is waterproof to 5m but retains good sound (compared to gopro, because everything is relative) it will cost 30 more to seal a 60m and 50 more to change the cover of the box and have a nice image Diving with a flat box (at gorpo must also buy a special box for a flat box and pay extra red filter while Sony did a dive mode with digital filter). Aerodynamics is very good as is the grip. (With GoPro, it will buy the 4 when it comes out, to have a good Aerodynamics) The GPS function is more significant that allows you to insert in post-processing, the course, speed etc ... (the gopro 4 should have a gps, but it does not yet exist). Free sony video processing software is not great but it can be used free GoPro also but it is not much better. Accessories available: sony sell a lot of accessories, comparable to official gopro. sony fixing is not a 1/4 "which is that of so cameras and provides access to a wide range of tripods or other ... I advise an adapter to use generic gopro accessories, plentiful and cheap. So if you do not have a computer and a last generation tv, the GoPro 3 black will avail you nothing. 230 months, the sony is comparable to the black gopro (excluding 4K and 2.7K) or better and is cheaper than a withe ... I advise very strongly the sony!