We were so pleased with our 1st ZW Dispenser we purchased a 2nd one for our boat. I was skeptical about the initial purchase living up to the claims but after several liters of water we could not only taste but see the difference between our municipal water and the filtered water.  Even more so on our boat.  We use marina water in our tanks and have been for over 30 years.  We were careful to boil our water before purchasing our dispenser.  Now we just run the water through and its safe and ready to drink.  We highly recommend you give ZW a chance and feel quite confident you will discover what we did -- delicious water.