This thing is great. Most of the time when i crash, i go for the head over heels tomahawk. That said, I wasn't going to risk a helmet mount. The chesty is great and makes me feel like my gopro won't break off and disappear into some snowy white abyss.
The only problems i have noticed are: (1)the chesty bounces just a little on bumpy terrain (it's not bad but tightening the harness doesn't seem to help much), and (2) sometimes my hands take up too much of the shot when i pole plant (could be prevented with a little effort).
That aside, this mount gets great shots, and in my opinion is worth every penny.