This jacket was amazingly warm in temps of -3; it breathes fairly well too - better than any other jacket I've worn. The 'omni shield' fabric they use does exactly what they say it does.
But the zippers are crap. I opened the underarm vents; and when I needed to close them they hung up, catching fabric. I had to take the jacket off, on the side of a mountain, to use both hands to free the crap zippers that had jammed in the open position.
I had the same problem with EMS parkas. Expensive materials; good design; and they use garbage zippers to save money. It shows a lack of respect for customers.