Summary: This is fabulous. I know that GoPro is the popular but after reasearch and comparison tests I chose sony. First, it mounts on the side of your helmet - not on top of your head. Much more descrete. The battery is about twice that of th GP, stablization is better and color is better. I purchased the AS100 when it came out and the Live View remote. Too cool to be able to see what you are recording so that you can ensure you have your scene framed.
Excerpt: I was a Contour user, but the Sony HDR-AS30V is 10 times better, the NFC/WiFi connectivity option is great. Sony offers a solid and practical design and a great variety of accessories as well.
Pros: Easy To Use, Highly Compatible, Lightweight, Produces High Quality Film
Excerpt: Lets the camera be place nearly in the middle of the action. The 120 degree fisheye is the least distorted. I wish there was a "no wide-angle" setting. The 170 degree setting is quite severe. The various mounting options are very useful - the skeleton case should be part of this "wearable" kit. I had to get that separately. The camera plastic is kind of chintzy - I feel like I'm about to break one of the doors every time I open (battery and port access).
Summary: With all of the raves about the GoPro I was a little worried about picking up a different camera. I went with the Sony because of the SteadyShot. I mounted the camera to my car via a suction cup with a one foot long extension. The camera shook like crazy while I was driving but the image was ROCK SOLID. you could not see any vibration. Connecting my camera to my phone took less than a minute. The image is great.