I have no experience of sleep-schools at all, but Yael, I just wanted to add my 2 cents worth re the wrapping & particularly the hammock.

As most members will know I am a HUGE fan of the hammock and I honestly believe that they DO really really help babies learn how to self settle and sleep by themselves in a peaceful way.

Charlie is, by nature, a great sleeper, so I won't use him as an example, but Olivia was a shocker, and the hammock, once she was big enough (4 months) to get that she could bounce herself to sleep, was the tool that "broke" the 40 minute nap habit for her.............(huge sigh of relief in our household, let me tell you!!)

My personal opinion is that from birth to 4 months, most babies have no idea how to sleep, regardless of bed (cot, bassinett, hammock) so it makes no odds and most babies need cuddles and patting and rocking.

But once babies adjust to the world, a hammock can be a wonderful gentle tool in helping babies learn how to sleep by themselves.

JMO, but I would honestly stick with the hammock...........