I got these to deal with east coat winter and, so far, I haven't been able to truly test them but on the few days where it was cold/snowy enough to pull them out they have been warm and provided good traction.  Waiting on more wintry conditions to really review....

OK it's a year later (01/2014) and now that I have taken these out several times in the snow and ice I can say that I am VERY happy with them. They are comfortable and warm and prevent slipping, even with someone as clumsy as me.