What is a good brand to buy for a home water purifier (water purifier)? I now have a few choices, SBOK (SBOK), the United States, Dalton (British original)?

If in accordance with the owner of a few brand personal recommendations with the United States, the United States of America's water purifier using reverse osmosis membrane is the United States of America Dow production, the world's top membrane manufacturer, Dalton Well, I honestly do not think it is still not, on a section of the cartridge, he can filter clean it? Unless that section of the cartridge is reverse osmosis membrane, but the reverse osmosis membrane out of the water taste is not good and is acidic, other brands will be added to the back of a section of the function of the cartridge so that the water is a weak mutation to change the taste. Shibaokang do not know. I don't know much about this brand and haven't heard much about it. There is also the most important thing to buy a water purifier is not to see what brand you pick but to look at the after-sales service. Please be careful.