Joey Gerhardswrote a review of Six Six One Evo Carbon Camber Helmet on March 26, 2013
Familiarity: I've put it through the wringer
This fits very well, offers exceptional visibility, and is so light that I frequently opt for it when only a full coverage XC helmet would suffice. I feel very protected and mobile inside it.
I can only say that I have experienced some chatter on the mounts for the visor, but this does not take anything away from its function in protecting a head.