Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good in theory until.....

We bought several of these things when we had our first child and I can truthfully say that they were a waste of time and money for us. First of all, with no sleeves, their little arms are left chilly while the rest of their body is all snug and warm. Even if you put long sleeved onesies on under it, the difference in temp. will send some babies into a frenzy! Secondly, the bottoms make it VERY difficult for a middle of the night change that you can guarantee will occur with newborns and young infants. By the time the child outgrows that stage, then they want their feet free to kick and touch and stand so it really doesn't get much use.