We discovered when we moved that the water at our new home has to be softened and tastes terrible.  We used a Brita pitcher and Pur faucet filter at our old home and found that neither was very effective there so we decided to try Zerowater.  We need to change the filter once a month but it is well worth having clean refreshing tasting water.  We spend much less on bottled water now.  Would love to see a faucet version for the kitchen sink.  Love this product and recommend it to everyone!