Instruct: Classify the given review into positive or negative sentiment.
Query: Warning! do not buy this popper - 3 microwaves burned out

We have ruined two microwaves using this popper. After the first microwave burned up (using the microwave popper) we thought that because the popper was several years old we needed a new one. So, we bought a new microwave and a new popper. We used both for about 6 months and the same thing happened. It's the Presto popper! And I have had to buy two new microwaves! When my mother's microwave burned out I asked her if she had been using the Presto popper and she said that she had. It has now burned out 3 microwaves. I do not feel that it is safe and will not buy another.