My son is 15 lbs and we were trying to transition him out of the swaddle. He has terrible reflux and the swaddles were making it worse. We tried the Merlin, and will it worked decently well, he wasn’t able to bring his legs up to sleep the way he likes. We got this one and he immediately started sleeping better! He started doing longer stretches at night and one night slept through the night! We’ve only had it for 2-3 weeks! Before this he was waking 3-4 times a night and was difficult to lay back down. Now I can lay him down and he practically just falls asleep and stays asleep. We have always loved dreamland and I’m so glad they make this transition swaddle! It has been a game changer for us!