A little surprised the disney version was cheaper than the generic ones.  We liked the swaddle sleepsacks but weren't wild about the fleece ones we had, so looked for a cotton one and came up with this.  It is great! works like a charm and unlike other ones the swaddle part comes off the sack part to make it easier to wash and dry.  Just wish the same was true of bigger sizes as our boy outgrew this one.