After extensive research on Water Filters and water filtration technology for over a year or more, I made the choice to purchase the 3-Stage Ultra Countertop Water Filter this past year in mid June. I've waited this amount of time so that I could post a more thoughtful and thorough review of this product. There is no other water filter on the market, and one as reasonably priced, that can compare to what this water filter does! We need to go deeper than just taste when comparing water filtration systems. Thankfully, the science and leading research are being done for us by this company and it's highly educated staff. It's not normally recommended that you use filtered water to make Water Kefir, but in my experience, my Water Kefir Grains love the re-mineralized water that my 3-Stage Ultra Countertop Water Filter produces. My Ultra Countertop Water Filter water is used for all the water I drink and cook with in my household. Behind the scenes, I know that Pure Effects keeps on top of all the leading technology when it comes to water filtration/purifacation, so that in the future, my replacement filters will be even better than before. You cannot ask for a better watch-dog company; a company that is looking out for your health and wellbeing. The Ultra Countertop Water Filter is the best water filter you can buy for your home.