Out of box comfortable, as long as you don't overtighten the laces up to the ankle. I wear 8w in clarks unstructured, 8-8.5 for other Keens (Presidio for instance, which is off the market now for men), but for this one I had to get a 9 and it fits snug with not-so-thick socks. So make sure you go up on the size, otherwise you may need to return them as I had to.
Also, Keens usually run wide. Guess what? Not this one, but may soften and give a bit in time. The color on this website is not true to the original, see keenfootwear.com for the real color, at least for Shitake/apricot combo.
The sole is fairly rigid but the insulation is quite good, tried them in -20C shoveling snow and had no issues. Decent grip on ice.
One thing that I cannot comment on is how long they last; usually I destroy the soles much earlier than the leather. I hope this rugged sole will last longer than others.