We just got the Merlin suit the other day, and I tried it with one nap on Monday, and one nap yesterday. I figured his afternoon naps are crap anyways, so might as well try it with the Merlin (I don't want to mess with his night time sleep yet, as it is JUST starting to get a little better!) It wasn't a complete fail as he lasted only 30 minutes before crying, but that's been the norm for him anyways, even when swaddled.

How did you make the transition to the Merlin? Did you go 100% and put your LO in it for all naps and night sleep? Or did you start with a few naps or night time only? How long did it take for LO to start liking it (or did they like it right away)?

Also, do you feed in the suit? It's so bulky to feed him in it, but I can't imagine trying to take him out and put him back in it in the MOTN (unless he has a poop diaper).

ETA: How old was your LO when you started using the Merlin? Mine is 16 weeks/11 weeks adjusted.