It's hard to say, the models change so often,
I have the original 'Hero Session' which is a little one button cube, bit of a faff to set up how I wanted but really simple to use after that,
shoots 720p @60fps (which is so out of date now) and is waterproof without an additional case.
I like it.
only sample I can find to hand
http://www.thelasturl.net/video/cartaoops.mp4
changed up two, instead of down (not used to borrowed race shift) entering braking zone at ~140pmh