meh, i find the handlebar mount well worth the money; it's actually my most used mount, and i don't even ride a bike :)
the main advantage over that thingy ^^
is that the handlebar mount can fit a wider variety of diameters, and it's also easy to place/remove + you also have a swivel arm attached to the h/b mount so it can be mounted on diagonal, vertical and horizontal bars without a problem :)
definately worth the money imho....
also a chest mount is a welcome addition simply because the helmet mount is so bulky, and in some activities you don't wear a helmet of your own but you will want good footage
ie. kajakking or rafting, you cant put an adhesive mount on a rental helmet and the helmet strap is too sketch, so you go for the chest mount :)
Belgium represent !
"The windows are vertical how am i going to poop on those?"-Killabees
"God isn't black, you fucking moron!"-Shibby
"I shit rainbows and sneeze glitter."-Arabian