Well, the jury is out, still. My road winter shoes have been worn quite a bit; they are Shimanos, same as my regular shoes. They are very comfortable. I think I am so used to my feet being burning warm from using the chemical heaters so much in the past years, that I need to tolerate being cool, as opposed to cold. The winter shoes i have that are for my Frog pedals (mountain) are Northwave and are much heavier. I've only worn them a couple of times, as I got them at the end of last winter. Before that, I had the PI Gore Alp-Xs for my Frogs and they were not very compatible, as feet kept flying out of the pedals. I had to order both of these from shops in the UK, because no one in the US carries winter shoes for women in a size 37. I got both for a great price, with no shipping.
DH has the Lakes and they look like they could heat a house! Seriously, he only wears them when it's in the 30s or below. He kept his other shoes and uses them for in between temperatures.