Funny

Involvement:Expert (understands the inner workings) - Ownership:more than 1 month

.: The cam is very rugged. Lost it at 70 km/h and it still works very fine.
.: It's very cheap for the product it is
.: it has 50 fps option : impressive
.: Video quality is fair but resolution at 50 fps is only 320x240

.: Support is fragile. It broke at the first use but I fixed it.
.: It has not internal batteries but uses AA 1.5V.
.: Audio quality is not good, but you can improve it removing the mic's rubber protection

.: It records Video files not compressed. One hour of video is something like 2Gb SD space.
.: First time it's not easy to find the right position on helmet. You need to try and try again to find the correct angle of view.
.: SD card slot is "reversed", not intuitive

Good choice : absolutely entertaining.
It's not a 720p, but it totally worths its price.