These boots kept me warm during 2 weeks trip in Norway (-15 degree). We did quite a bit of walking in snowy weather but it was perfectly water proof. I have extra wide feets so went 1 size bigger than normal, which turned out to be perfect :) I love how versatile they are for any fashion. It was also easy to take on and off. One point I want to emphasis is the need to thick socks. I was about to have a blister on the side heel because that part was a little hard. After I wore thick wool socks I had no problem with it.
I bought 2 pairs for my daughters to hike in China during the winter. Their feet were warm with normal socks in -16C weather. Easy to put on and off and held up to the rough terrain really well. I'm going to get a pair for myself now as my Khombu Ashton's were not nearly as good.