We bought the aquasana reverse osmosis system because we are on well water, which is softened, and doesnt taste very good. This system makes the water taste AMAZING! I swear its what I imagine water directly from a natural spring to taste like. We have an auto delivery every 6 months for filter replacements and its very easy to change the filters. It also doesnt take too much space under the sink, and the faucet installs easily over many sinks.