Great boot, wore them for the first time this weekend.  Received snow overnight so I put them on, snow melted by noon, but I stayed in these boots all day long.  Warm and very comfortable.  True to size.  Loose enough to be able to wear extra wool socks if needed, but they don't flop up and down with just regular socks on.  I am a huge Shape Up fan (because of an injury to my ankle)and would definitely recommend these boots.