I am up in the air on using a Garmin ViRB or a Go Pro 3........ 

for you guys that have one,

how do you mount it?
how do you control it?

and why did you pick that one over any other?

I got the gopro3 black. Use it tons for alot of stuff. Works great. Bought a cheapo amazon "eeekit" (multiple mounts) I found that the handlebar mount is too shaky for me. I prefer head mount.

Careful, apparently they are looking at the helmet mount as the cause of Schumachers injuries being more serious.

Contour Roam, I usually mount it to my helmet. I just got a SJCAM SJ5000 (Go Pro knockoff). I'm go to try mounting it to my handlebars... The SJ5000 can be control by my Android.