I've had this for a couple of weeks now and am very impressed. On first inspection the camera itself looks like a toy; it's small, cubic, and not particularly sexy - though it's clearly well constructed. The accessories are high quality, especially the robust, waterproof (to 60m) housing and it starts to look the part once it's been fully assembled. I use it for kayaking and swimming (I mount it in various places in an 'Endless Pool'), there are various ways to mount it but I find the industrial strength suction cup to be the most versatile.
The quality of the video is outstanding, it offers various resolutions up to 1080p, I've been using it on 960p as it offers a wider angle of view on this setting then the 1080p - and the results are superb.
I chose this camera after researching the alternatives - I like the look of the Contour, but it's not waterproof (eseential for me) and the quality of video does not look to be as good as GoPro - though I think it beats it on asthetics.
All in all - a brilliant camera, great selection of quality accessories, well made and seems to be the choice of the professionals.