Pros are that it does keep your head/face warm. It also fits snug so no cold air enters through and freezes your ears.
Cons are that it isn't as breathable as described. You do get that breathability but not as good as described. I wear glasses and i still have to coat my lens before using these in the cold air.
I bike ride commute to work and have been using every other day. I switch off with another type of face mask just so I can wash before using again.
Good price for the product.