Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Would not buy this warmer!

We weren't planning on using a warmer at first but we thought it would be easier-it works, sometimes.... as someone else mentioned it goes by how much water you use, but sometimes you can put the amount of water it suggests, and it won't be warm at all, other times you can put in the same amount water you put in before, and it will be piping hot. ours is very inconsistant, but that may not be the case with all of them- i would choose something else next time..