We wrapped our DS until he was about 9 months old. We wrapped him with 1 arm loose so that he could roll over if he wanted to but the wrap made him feel more secure and helped him sleep. He is now almost 4 and still doesn't sleep through though (either does DD). They both sleep through 2 or 3 times a week, otherwise we are up at least once every night. After tearing my hair out and feeling very hard done by sometimes I've come to the conclusion some bubs sleep well and some don't!