Instruct: Classify a given review into positive or negative sentiment.
Query: Fire Hazard

I bought a 12x15 inch Kaz SoftHeat heating pad in December 2007. On 12/07/2008 the electrical cord unexpectedly broke at the junction of the cord and the blue stress reliever, shorted out, and began sparking. Fortunately, I was not shocked or burned. The pad had seen daily use due to a back condition, but it was not abused. I have contacted Kaz for a refund. The materials used in the pad appear to be inferior and I won't buy any more of their products.