GoPro

Great perspective for riding. You get a better feel for the obstacles you are riding. Comes in a small bag that you can also put the camera in to stay organized or if you don't have a camera pocket in your pack. Really easy to change mounts and attach the camera. The one thing is the angle sucked for me on the first ride since i didn't adjust it properly. The next time I put it up higher on my chest (probably around the area if you touch your chin to your chest) and also used my Camelbak strap to support it. Now the angles are awesome. Highly recommend this accessory.

The chest mount is probably my favorite GoPro acessory by far, I just love the angle and perspective you get with it. It is not cheap for an acessory like this but I do think it is worth it. The only drawback with it is that sometimes you get a shaky footage if you don't strap it well enough.