I wanted to swaddle DS from birth, but was advised by midwife and HV that it wasn't recommended for night sleeping, as it could be dangerous, although was okay for daytime naps (presumably because I'd be there to notice if something went wrong?). We had one of those swaddling pouches with the velcro on, but DP didn't like to see DS with his arms and legs restricted, so we stopped using it after a couple of weeks.
Now, at 3 months, his sleeping has recently become very disturbed, and from watching him sleeping, I think it's partly because he moves around a lot in his sleep, and so wakes himself up. I've started swaddling him using an ordinary blanket for daytime naps, and it does seem to make his sleep more peaceful, so I'd quite like to try it at night, too.
For those of you who do swaddle overnight, do you use a pouch, or just a blanket? Is there anything else I ought to know before doing it?