The chest mount does give great , immersive shots, there are dangers however. I have just come out of a 2 week hospital stay after supermanning into the ground from my mountain bike. I hit the camera mount pretty hard as I ploughed into the ground, the camera mount broke 5 ribs and lacerated my liver to add to
the punctured lung , shattered wrist and severe concussion. I would say use with caution. Video here: http://youtu.be/vqiRFO_AJZc?list=UU43a7OxBm-wM123YXKOKENw
Ouch! At least you will be back in time for ski season.