The buffalo, in my case the special 6, is brilliant, never been cold in mine, but it is now threadbare(got it in 92ish)so I'm going to get another. I have also got the snugpak version, not as good, but it was only half the price, & also got something similar by a company called solo, which is very nice & a bit smarter & gets worn when in town during the winter.
The buff, to me anyway is the bench mark for this type of jacket/smock, they are tough, mine bears witness to this with its numerous tears & cuts, but still works, its done everything from winter cycling, canoeing, walking, dog walking, its been abroad to the rockies, used as a pillow, & now lives in the van for use at work. I was going to buy a new one before Christmas but couldn't find one locally, & as I've put on weight, I want to try a couple of different sizes before I buy !.
Rob