I always freeze them. They defrost in a jiffy and are really yummy. I slice before freezing because I am usually making my son and egg sandwich with the croissant.
My big complaint of recent: Why aren't they crescent shaped anymore?? They used to be a nice round crescent shape;now they are all elongated. Bummer! I've tried Costco in MD and VA and they both do the long shaped croissant now. Has anyone found the round shaped ones????