I love the taste when the water filter is new however the water taste does decline as the filter is used.  I have the light up only TDS meter and the water will start tasting bad before the TDS meter lights up,  This makes it difficult to use and I have had to toss a whole pot of coffee due to the water making the coffee taste bad.  I really do not feel I am getting the life out of the filters that I should given the cost.