So far, its just a plastic hat.
I haven't taken any falls on this yet (expect an update soon...) so as of yet the helmet has only served an aesthetic purpose. But in that regard its been great, with more of a freeride look than some similar helmets.
I like the coverage in the back, as it seems to offer more protection than many other helmets.
I've worn two other Giro helmets skiing for several years, and I find that the fit is the same for the size M. The adjust-ability has worked out fine for me, and while the strap doesn't really offer much in terms of adjustment other than length, I've never found much need for additional adjustment anyways.
So far, I'm a fan.