Erm.. I'm so late posting on this, but I wanted to give my 2 cents. Julie was swaddled until she started flipping, then she went into sleepy sacks. I try to get her "ready" for bed (bath, diaper change, into sleepy sack) before her bedtime bottle and sometimes it just doesn't work that way. If I lay her down without her sleep sack on - EVEN IF she's in footie pajamas or whatever - she wakes up. And up. And up. LOL I have to put her in the sleep sack for her to sleep.