" I bough this RO system about a month ago, and i really happy with it. I couldn't tell how much better from the tap water by the eyes but i did the test. i boil both water in a pot on the stove, i found the water from tap leaves a white stain on the pot but the water from RO system doesn't leaves anything on the pot. I mostly use RO water for drinking, tea and coffee. I really love the taste of my tea and my coffee, it doesn't change the taste of the drink but bring out even better taste. it's same me a lot of money, have better water than a jug with the small filter inside which i had to change the filter every week and spend more than 15 pounds a month (don't wanna tell the name). "