Great design. Very comfortable, warm, dry, and useable. Doesn't feel like you're wearing baseball mits like some of the other very bulky mittens out there. I have really poor circulation in my hands. The wrist adjustment is in the perfect place to keep the mittens on, but allow for good circulation with the ability to grip poles, and open the flask to take a little nip.
I really like the features like the "nose wipe", zipper pockets, and the liners are great with the grippy palms. I even use them driving.
My hands measured a snug 9" which is a L. I ordered the XL (as I usually do) and they fit perfect.