With the recent snowstorm, I was finally able to try out these boots I bought for $60 at Sports Authority. I was skeptical that they would keep my feet warm after reading plenty of reviews on other (more expensive) -40 rated boots that failed to meet this standard.. so I started off layering two pairs of regular socks. 2+ hours later trudging through >1ft deep snow, and my feet felt great! The next day I downgraded to only one layer of socks, and they still held up very nicely.  They're real easy to put on / take off, unlike some other heavy duty boots that require hardcore lacing and another person to pull off.

I'm usually a size 8, but the store only had a size 9 so that's what I got. Even with one layer of thin socks, the boots did not feel too loose, so I would suggest to buy a size up.  Also, I'm certainly not one to care for looks, but I love the way these boots look. I'm soo pleased with these boots, especially for the price I paid. Highly recommend!

Update 11/19/12:
I wore these boots during a week long cabin trip in the Adirondacks where the temperature was 10-20 degrees during the days.  I was trudging through deep snow and/or snowshoeing up mountains 8 hours a day, and these boots always held up and kept my toes dry.  However, when we spent one night sitting on a frozen lake, not moving around for a half hour, my feet did get cold.  Still dry, but chilly.  I also know people with poor circulation problems in their feet who get cold very easily, so if you're one of those people, these will probably not keep you warm for a prolonged time in the snow.