I don't know if this will be helpful to most since I got it for my cats and not an infant. However, the reason I wanted this was because of the raised four sides. I needed to keep my large cat from falling off the table when he would roll over (about 25 lbs), and this has certainly solved the problem. I was able to use the safely belt to attach it to the table, so it doesn't slide off when he jumps up. I realize babies don't jump up, but at a certain age, they do roll over and get squirmy, and this shape seems to be comforting, like a coccoon. I would like to get another one because it is a favorite spot.
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