I love the idea of it since they are suppose to make middle of the night diaper changes easier, allow baby's legs to be together and touch, no snaps or zippers, and just cute all around. However, no matter how many times I try them with each new baby I get the same thing. They ride up to baby's waist and everything below is exposed so its basically just a t shirt on them with a lof of excess in the middle.
All mine have had the elastic bunched trim at bottom and a few were just long with nothing at the bottom to gather them they just fell. I have come across some older ones where you can pull the string at the bottom to gather it closed all the way like a sack but I don't like the idea of string having from baby's clothes. Just seems unsafe. I had one that looked promising as it was gathered so snug by elastic at the bottom that it was all the way closed and you had to pull it open but the minute baby's leg or foot slipped through, it rode up too and was just sitting again on their belly.
In winter with one of my kids I actually used one of those wearable blankets that zipped all the way down. She only co-slept part time though. Crib was right by ours, I mostly would pull her out of hers to me to breastfeed then move her back when she was done, or next time I woke.
I wont be doing that this time probably. Didn't work for last baby, he needed to be by me all the time and would sense if he wasn't. So, planning to exclusively co-sleep means the sleeping bag is too hot. I dont know of a solution really except not to use gowns. My babies are so long their feet always slip through and after that you can't avoid the ride up.
Maybe if they velcroed closed at the bottom or just one snap in the middle (which I would add myself...hmmmm... Wheels turning as I am typing....)
I can't be the only one who has this problem with the gowns.