We are very happy with our dreamland sleep sack. We bought the 6-12 month for our 3.5 month old and just at 15 lbs. He didn’t love it the first couple times but within the first week of trying the sack he started to sleep well in it. Before the sleep sack, when we’d lay him in his bassinet, he would thrash around. The sleep sack stopped that from happening. He has slept better since. We have been using it for a couple weeks now. I am hoping that we soon will get to sleeping through the ni...