I bought the ladies down mittens when they were selling a few days before Christmas and they seriously blow my mind. As a life long Texan who now has to deal with terrible Boston winters, I couldn't be happier! They're warm, dry, and super comfy, and they have nice grips on the palms so you don't become completely useless like with other mittens.
As far as the sizing, they do run a little on the big side. I have chubby non-ladyish ogre hands, and the mediums are a good fit with a bit of room to wiggle.