My 4.5 months old baby is/was a swaddle addict. He still has (or had) very strong startle reflex so he would wake himself up as he is trying to fall asleep. He is a wonderful sleeper with a swaddle though (we use the woombie)... 12 hours at night and 3 - 4 hours total daytime naps. I didn't mind swaddling him and I would not have a problem continue swaddling him but... he has a really flat head! I think it has to do with the fact that he doesn't move around much at all during his sleep and he sleeps in the same position all night long. I tried repositioning his head but he always moves back to the middle. The back of his head is super flat and I'm starting to get worried. After hours of google search and talking to other moms... I realize that him being able to move around and switch positions during sleep is going to fix his flat head issue (along with lots of tummy and sitting time when he is awake). We tried having him nap during the day with one arm out this week but most of the time he would not be able to fall asleep. So I ended up having to go in and reswaddle him and soothe him. But today was different... during his first nap today he slept a total of 1.5 hours with one arm out. Then for the second nap he was in his car seat because of church.. but for his third nap he was completely out of his swaddle and in his sleep sack and he slept for 20 minutes... so we decided to be crazy and have him sleep unswaddled for the first time tonight... he went down easy... fell asleep without any jerking... but let's hope he stays asleep! Please pray for us!