We purchased a new home and lost our whole house RO system when moving. To replace it we decided to try the ZeroWater large dispenser. It has been almost 3 years and we change our filter as recommended by the manufacturer and we believe we have the best water in town! It is better than the 5 gallon delivered Spring Water by the multitude of delivery services and we don't need to keep extra bottles around. When the dispenser gets low just top it off with the local tap water and in minutes we have our refilled ZeroWater!