My buddy just ordered one and decided he's sending it back. The reason? - and sorry if this has been mentioned, but I don't think it has been - If you're wearing the mask component, you can't put your goggles up. That is, the face mask has to come off first, then the goggles. May seem like a small deal to some, but I can see where that would be a pain in the a$$ if you just wanted to pop your goggles up while on a chair lift or something. The mask clips over the goggles if you're using it.
edit: And since the face mask clips on over the goggles, it would seem that other goggles (like the Oakleys mentioned) wouldn't mesh well with the component-design of this helmet system.