Seriously, I almost gave up on this blanket. My cousin recommended it because her baby sleeps...well...like a baby in this blanket. I didn't think Penelope liked it until last night! She slept for 6 hours straight in this blanket last night and right now she was freaking out and I swaddled her up tight in it and she instantly calmed down. We all know the benefit of swaddling, but this blanket makes it so the baby cannot get their little arms out.