I got the ATC@k as well my biggest grip is if you use it on the top it USusally ends up pointing to the front wheel for the entire video, you really need to have it pointing to the sky, cause when you ride it ends up pointing donw.
Can be a little shaky but i thnk thats the low FPS . but for for the ease of use and the fact it water proof and relively same i like it, also its hit a few things over time and survives well ( has no bits hanginig off it to break off)
Down side is you can get 2 GB spy pens for $50 these days that you can just duct tape the top half to the bike or yourself and get the same, if not better vision i have found.
Other down side on the bigger units is they seem to be real hard to watch if they are mounted to fixed items like bars etc, you really need to mount them on you so you cushion the vibration and keep it soft and flowing aned in the direction of interesting action ( we also spi the cam backwards to show the chasers
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Hey Cj what did you do to mount on the side ? i tried the rubber strap but i coundt find anything to wedge it out to the straight position, it wanted to fall back to line up with the chin gurad ? Photos of mounitng please :O)