Pros: Warm, Comfortable, Good conversation piece/attention
Cons: Almost too warm if in the high 30's+, small fogging in -temps Hmm, other Cons..some people think you are odd? not much of a con.
I got this mask early Feb 2011, was very cold out -5f for my first test, skiing fast was no problem with this mask. My face was not cold at all, There was a small bit of mask fogging, wasn't an issue tho.
Now for the Pros
The mask gets attention! Its a great icebreaker, and starts conversations almost by itself. It does get you recognized and people know who you are right away ;) So don't even think of ducking ropes or going OB..I never do but something to be aware of. Lifties also recognize you quickly, and if you're social and talk a lot they'll always say something on it. Of all the people I've talked to, nobody was really mean or negative..seems to put people in a good mood.
If you need a mask and icebreaker its worth it. :)