I got this helmet to have a helmet for BC telemarking and climbing and hopefully someday for minor ski-mountaineering.
It fits fine, this is of course subjective and it shouldn't be expected that the helmet will fit like a glove on any head it rests on.
The winter kit works just fine. After one season the plugs still fit nicely into their spots. As they are just foam plugs I would wager its not to hard to manufacture up your own if you had the gumption.
The only problem I had was I didn't install the extra velcro to secure the ear flaps of the winter kit. They still work just fine when the chin strap is clipped but sometimes are a pain to get in place.