why only 80%
Had one for about a year now (since they came out). Totally awesome for my paramotoring.
Couple of things though - you mention 60m waterproof and 'amazing underwater clarity' - er... that is mince. Even GoPro admit that you cannot use it underwater at the moment without getting a blurry image - its a 'feature' of the curved frontal lense - So it is useless for underwater sports at present unless you put it in an underwater case or DIY the lense.
Would have been nice if you had mentioned editing footage - as I find many many owners seem to have difficulty with it mainly simply due to slow PCs, etc but it is certainly a surprise to most that there 5 year old PC can't cope with 1080p editing (as a rough guide - >2GHz dual core required for smooth 1080p playback with no graphics acceleration - which u are unlike to have if yer PC is slower/.older than that anyway).
For those interested in seeing examples of of its use in paramotoring: