Pardon my French, but they're shit.
They feel like they'd disintegrate if they fell on the floor, the one I had misted up all the time, the poppers didn't align properly so it was a pain in the butt to 'snap' the chin bar into place and the visor and helmet had a huge gaps between them so water gets in everywhere. Oh, and the paint flaked off and the chin bar pivot screws came loose.
That said, Roof's full face helmets seem pretty good.
The boxer is expensive for a very substandard, and dare I go so far as to say, dangerous helmet.
Trust me. Spend your money elsewhere.
I have a BMW Enduro (which actually costs less) and due to the MX style it's got plenty of room in front of your face to make it nice and cool in the summer.
But then I wouldn't get on a bike without a full-face helmet.
Ever grated a sausage?