One star, yes, I know it's GoPro is the top-level quality and everything except edition 3 has repeated worries that do not appear on. I'm in an environment where my colleagues are equipped with GoPro. The troisème edition goes quickly to block the only option and remove the battery and after a while it crashes. It must be return in SAV in Holland, balance two months of waiting. I am the second return service for me and most of my colleagues are beginning to see the symptoms appear. Add to that a service calamitous. The GoPro 2 was indestructible, the 3 has recommended. Unfortunately it is the leaders and more the image quality is top so not too many choices. For my part I rock sony.