I bought one yesterday
A Trooper S1 Fullcut to be precise ( http://www.sweet.no/download/trooper...trialwhite.jpg
). I hadn't decided which one to get before going to the store, but the fit made the difference for me. I've got a big head, and even the largest size Rooster was too small for me, too short front too back. The Trooper has a slightly different fit, the size was the same (59-61, L/XL), but it was longer enough and a perfect fit length wise. It also seemed a bit deeper, ie it goes further down my head. It's slightly wide but, supplied with every helmet are 4 mm fit-pads, that you place inside the removeable liner in the helmet to make sure fit is perfect.
Vents: There are two inlets on the front that, it's better visible on the non-visor model ( http://www.sweet.no/images/produktbi...trialwhite.jpg
), that can be opened or close. Haven't tried it yet so can't tell you how much difference it makes.
Also included was a very nice helmet bag to protect it when it's not protecting you
Haven't got much to compare it to in regards to fit, there hasn't been alot of options here yet. High-end helmets have been sadly lacking in the shops assortment. I've been eyeing another scandinavian product, called POC ( http://www.pocski.com/
), but their shipment was delayed here and I got impatient... My old helmet was a Cebe Freestyle, like this one: http://www.skionline.pl/sprzet/zdjec.../freestyle.jpg
Also in the largest size available when I bought it, 61 cm I think. Besides being well-used it also suffered from being too short and wide, seemingly more so every season.
I'd take some pics for details but I left it at my parents along with the rest of my ski gear, so won't be able to for a couple of days.