Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Cheap materials; poor quality control

Krupp's first unit was defective upon arrival. The cheap plastic parts that control water flow into the caraffe were broken - likely well before the item was ever shipped.Krupp's second unit was also defective. This time the water tank leaked all over my counter even before brewing could begin.After over one month of back-and-forth with the poor retailer (Amazon.com) I STILL HAVE YET TO GET A SINGLE CUP OF COFFEE BREWED. Based on this I cannot recommend highly enough that you STAY AWAY FROM KRUPPS.