These are the warmest gloves/mittens I have ever seen.  No problems with the Velcro attachment, but I don't use that feature very much.  The mitten pulls back easily and stays out of the way on its own pretty well anyway. If you are looking for warmth, these are the ones, but if you want flexibility, they could be disappointing.  The several layers make them a little stiff, but that may change with use.