DS HATES being swaddled. Hates it. Probably because he wasn't from age 2 weeks to around 8 weeks - when he started this crazy flailing/thrashing/grunting/crying thing - and so we had to bring it back. It DOES help him sleep - not necessarily longer stretches, just ANY stretches. The flailing thing was literally waking him up a couple times an hour - now we're back to at least 3 or 4 hour stretches at night. Which isn't great, but we'll take it. Sometimes 1 hour stretches when he decides to fight the swaddle hourly in the wee hours of the morning .. argh. I'm tired. I can't wait to get RID of the friggin' thing - I feel so bad forcing him into an MB or SwaddleMe at night as he cries - but he does calm down quickly as feed him a bottle, then bounce him and hold him close in a dark room, and then put him down.
But I will be SO GLAD when the inadvertent muscle spasm/thrashing/flailing thing is OVER.