Dom and ChrisL have posted reviews of the more recent version of this helmet. As well as the great recommendation from DavidR here in Fairbanks who has ridden snow machines using these helmets for full days without fogging or icing.
Monday Afternoon Update - The helmet works great! Not even a hint of moisture on the visor even with it being completely closed right off the bat. Usually, I need to keep the visor cracked open until I'm at almost highway speeds. The chin guard is a bit difficult to get down with the face mask in place and feels a bit cluster phobic but it is oh so much warmer. The ride in this morning was at -22°F and normally just the short commute would be sufficient to have the lower part of the visor iced up. Today, none at all even with the longer route.