Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't buy a Keurig model B60

There is a flaw in the construction of Kerurig B60 coffee maker. It will plug up and stop making coffee, even through you have followed all of the cleaning instructions. The one I have failed after three months of daily use. Kerurig customer support is less than helpful, claiming that you must have used bad water in the coffee maker. I even used bottled water, and it still stopped up. Keurig should not be able to market this model.I have a different model and it has worked for over two years without any problems. I yet to clean it, and I use straight tap water.