Update: I tried on a Minus 33 shirt at sportco and I really like how soft it was and the cut seemed right to me so I went on to ProMotive and picked up a set. They came in the mail yesterday. I of course had to try it on. I have no idea how they get this stuff so darned soft. It isn't quite silk but it doesn't seem like wool either. For being 100% wool, I am really happy with the fit. I'm 6' and 220 lbs so I got the large pants and xl shirt due to my arms being long and having long shoulders. I will update again when I get some field experience with this stuff, but so far I think I'm going to like it. Only had it on long enough to show the wife how soft it is and how it fits and it felt like it was turning the heater on so I took it off before I got warm. This was directly after picking it up off the porch.
Smartwool seemed just as soft but I couldn't find it anywhere near the same deal I got so that's one of the reasons I went with minus. I'm thinking I'm going to be really happy with this stuff.