OK, I'll be the first on this post to admit I own a Modular (NMFH).
I wear it on the nasty days or when it's just too cold to wear an open face with a pair of goggles.
The field of vision is
MUCH bigger with a full face compared to goggles hands down.
You don't have to spin your head all the way around like Linda Blair in the exorcist to see what's next to you and with a damaged neck that is huge.
The only bad thing is that it is real heavy and makes my neck sore after a day's ride.
Maybe only because I've had a broken neck and had it fused though.
I've NEVER had it fog on me...period. The breath mask is tough to get used to but it makes all the exhaled, moist air exit out the sides of the helmet and away from the clear shield.
If they could make it half the weight I would say it was the perfect helmet for a full face.
I bought it from a Ski Doo dealer when they first came out with them and the only color you could get them in was yellow!
I might even get a new one now that I can get it in black.
It's the original "Modular". (as in the "M" in NMFH)