Instruct: Classify an Amazon review as either positive or negative.
Query: Depends on what you're using it for

I purchased this "hot plate" to use for roasting coffee beans outside.The problem I encountered with this model was that it would only heat for a few minutes and then would shut off to cool before heating up again.Coffee beans take approximately 6 minutes (give or take depending on the type of bean) to roast. Just when the coffee beans were entering the last stages of roasting, the unit would turn off. Not good.For the low price I will keep the unit around for other potential uses should a need arise, but as for the intended purpose that I bought the item (roasting coffee beans) it is more or less useless.