My 5 week old baby is colicky & a jerker. I have tried just about every gimick there is and the Woombie was my last grab of desperation -- guess what, it didn't work. The stretchy fabric is TOO stretchy and doesn't hold my baby in enough -- that is the purpose of swaddling right?! I can identify w/the reviewer who said her baby's head looked like it was attached to a bag of angry kittens!! On the Woombie website, it suggests giving your baby a few days to get used to a different method of swaddling but honestly, how much longer can I torture an already sleep-deprived child?! In addition, the zipper is PLASTIC!! I have never seen a cheaper looking piece of plastic crap in my life and it definitely adds to the struggle of trying to zip your squirmy baby up! I guess I'll have to stick to my swaddling blankets.