Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Poor Product - Poorer Customer Service

While the DGB-600BC makes good coffee when it's working properly, the product is prone to malfunctioning. In the past 3 years, I've had one bean grinder die and another machine leaked water from its base.In an attempt to get some assistance and/or guidance from the manufacturer, I emailed Cuisinart on its own website ON TWO OCCASIONS and have received NO RESPONSE whatsoever.