I bought these back in June when I knew we were moving to Alaska.  I just wore them for the first time the other day and let me just say, awesome!!  I have been wearing rain boots for the past month as it hasn't really been cold enogh for my Sorels but my feet were always cold.  So I decided to bring out the Sorels, my feet we not cold once when I had these on!!
They do run big, I wear a 7-7.5 and these fit more like an 8 but I don't mind as I will have bigger socks on when it's colder.  They are comfortable to wear, very warm and look great over all great boot!