Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Quit working after four months

I received the DR4 Mr. Coffee Four-Cup Coffeemaker as a gift this past summer and the other day, mid-through the cycle, it stopped working. The heat plate turned cold and the remaining water in the unit stayed in place. Contacting customer service three times led to not so much as a form letter, so I'm done with this brand. I don't recommend it.