My baby is pretty content in his swaddle with his arms down by his side, but loves working his arms up/hands out... and sometimes I think that keeps him up (him struggling to get arms up) . He still wakes himself up when his arms are out due to his reflex, so I don’t think we’re ready for them to be out completely yet. He’s 9 weeks so thinking he will soon be transitioning to a sleep sack. Hope this works out for us in the in between period. Let me know if you’ve used it/how it went!