**UPDATE**  I've had these for about a year and I still love them!  So warm and comfy.  With the temps around 40 below, my feet NEVER got cold.  Can't say enough good things about these boots
I really like these boots because they keep my feet warm.  They were really tight when I first put them on, but that have loosened up after a couple of wears (I had to wear thin socks).  They run small are a narrow.  I usually wear a 8 or 8 1/2 but ordered a 9 after reading other reviews.  I would recommend these boots for cold weather.  We have been having record cold temps and my feet haven't been cold yet.  Order a size or two larger than you normally would and know they do run narrow.