First, I have to say WM bags are amazing. They are built well, and really have no equal on the market.
I'm a woman, 5'11" and slender built, and a cold sleeper. I loved this bag because this one actually fit me right. Other Men's bags are generally way to roomy in the shoulders, and women's bags aren't tall enough. Unfortunately I took it for a test run a few days ago and although the temp just hit 25F outside, I was still cold. I'm not quite sure what to do because WM doesn't make any other bags this sut at a lower temp rating. :(