Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Heating pad

I like the size of the heating pad. It has an automatic shut-off, which I don't like. When I got it, I thought it was defective because when I tried to turn it back on, it wouldn't turn on. I finally figured out that I had to turn it off and on a couple of times before it would work, which is a hassle. The pad inside doesn't crinkle up as much as the smaller sizes, which I like.