When it got snowy and icy the other week I ordered a couple of pairs of Docs, and I am so glad that I did. They are superb on snow and ice and ever so comfortable.
The other day I was at the bus stop and people were stamping their feet to keep them warm while I just stood there with cosy warm toes.
They are not cheap by any means, but they will last forever. My boots from the 1970s are still going strong but they are more suited to country hikes than around the streets or visits to town.