I have had one for about 8 months.
I'd give it around 80% as well to be honest.
I use it quite a lot, places I wouldn't dream of taking a full HD camera with me. Just set it going pointing in roughly the right direction and you can get some awesome footage. The 60fps mode is great for slow motion shots and fast paced action. Decent battery life and good sized videos so a 32GB card has plenty of space.
I had a few teething troubles with mine and still have issues with it but for the price I would go out and buy another one especially with the new firmware update and the range of accessories coming through now. Also seeing it used on a lot of TV work The air jaws and bite cam for example.
Does work underwater if you are surfing etc but for snorkelling or diving we will have to wait for the flat lens housing :)
I went overboard on the 60fps slowmo in this vid and haven't quite figured the mini steadicam out yet :)
And one of some rollercoaster action truly can take it anywhere, strap it to your hand and hold it with 3 fingers, awesome toy :)