This is my husbands account, so I am a girl writing this. I have had these for a week now and they work great. It is not hard to pull the mitten part off of the button, but I have not mastered getting it back on the button. They are very warm, and slightly big but just fine. These might be too big if you have small hands. I have small palms and long fingers. I gave it 4 stars out of 5 instead of 5 out of 5 because I have not had them for very long. But so far so good...

Edit: took these on a 3 month backpacking trip to Europe in the winter and they were warm but the stitching that attaches the part that goes over your fingers came undone a bit. Still worth 4 stars!