Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Keurig needs to go back to the drawing board on this

I love the Keurig coffeemaker and the convenience of the K-cups; however, I wanted to have the reusable filter as a backup if I ran out of K-cups. IT DOESN'T WORK! Coffee was too weak and not drinkable, and it made a mess when attempting to brew - water splattered all around the coffeemaker. I'm very disappointed and hope Keurig will redesign one that works.