I have run 1600 liters of water through the machine so far and it has worked fantastic. Our power falls between 3.5ph low and 11ph high. I can't comment on the ORB values as I don't have a meter. I can comment on water efficiency in many different ways. Our biggest use is the antioxidant button, yes it tastes different than regular tap water but for the better. Ever since I started drinking this high pH variant, I just feel better in the morning. The "Coffee/Tea" button produces amazing tasting coffee, and the "Beauty" button produces slightly acidic water that our plants thrive on. We then also used "cleaning" water to keep our kitchen sparkling streak-free. I've seen videos claiming that this machine doesn't do what it says it does, but the test kits I use on our local water tell me this machine actually does the job. Come to think of it, I spent almost twice as much on a popular Japanese brand that we tested. Even though it has a pH of 2.0, it still costs twice as much as this product and we don't have a medical facility to disinfect it. So for us it was the perfect product so we are happy with the purchase
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