Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Funtional, Easy to Use

I'm not sure what more I can say than that it is functional, easy to use and has three heat settings. It does what I expect a heating pad to do. The cover stays on (I've had some I had to fight with) and the control is easy to use - it slides rather than having a dial that has to click, if you know what I mean.