content: I had an issue with my B50, and Keurig was absolutely great about resolving my problem (thank you Kathy in customer service)!! I didnt realize that my water is very hard and combined with my low use of the machine it naturally caused build up on the sensor. This wouldnt have happened if filtered water was used or the hard tap water didnt sit in the container for several days at a time building up mineral deposits which was my fault for doing, not a product issue. But Keurig (Kathy) was really super about taking care of this for me. I've had a great experience with Keurig and the B50 product, and will say their customer service is fantastic.