Yep! My DS is huge and really strong and has been breaking out of swaddles since week 2. Started him in the Sleepsuit 2 weeks ago (he was 13 lbs) and he loves it!! He can move his arms and legs but the suit muffles his startle reflex and helps him stay asleep while he passes gas. He went from sleeping 2-3 hours at a stretch to 5-7 hours! Still can't last the whole night but it's a big improvement. FYI- it's been over 100 where I live for weeks and DS doesn't overheat if we keep the AC at 75.
We loved our Magic Sleepsuit. It truly saved our sanity (my husband calls it the miracle suit). We have used it for 2 kids now and had success with both, have it in storage for baby #3:) We introduced it when our LO was breaking out of the swaddle around 3 months and both kids loved it. We never had a problem with overheating either we dressed them in a onesie and diaper. It is my go to shower gift and all my friends love me for it!
Re: Merlin Magic sleep suit