Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Loses heat FAST!

So, unless you plan on rolling your hair in the kitchen or have a microwave handy in the bathroom, you will be disapointed in how fast the rollers lose their heat. I had to stand right next to the microwave and reheat the curlers several times until I had used up all 12 curlers.I think it's a great idea but it would be even better if there was a way that they would retain their heat longer. I'll still use mine, just not as much as I had hoped for.