Recently i bought a Delphi H2 water ionizer for under the kitchen sink. The water tastes wonderful. The ability to easily adjust alkalinity from the faucet is super convenient. It is fairly small compared to the reverse osmosis filter that used to be there. There are 5 levels of alkalinity which are easily selectable from the faucet itself. The suggestion to use alkalinity "level 4" for coffee has resulted in the best tasting coffee with no acidity. I found this water ionizer pricey for my budget. On the other hand, can healthy and safe drinking water be sacrificed if it is possible to have it? For me, it was worth it and I would happily make the same choice again. I love the faucet and the water that comes out of it. It has a lifetime warranty which helps too. Sean helped me decide on this particular filter. He is an expert in the field and was extremely helpful and patient with me. His knowledge and demeanor made me feel well advised and confident that I was making a good decision. He offered very helpful information, and even a small discount since I missed a sale by a day. His level of expertise was rare in my long search for good water production. I felt relieved to find Sean (company owner) and receive the benefit of his knowledge. Highly recommend him and his company, and the Delphi H2 ionizer as well. I am so happy that I splurged on the best water I could figure out how to get. I am betting that my health will reflect having clean healthy balanced water to drink. Filters will cost me about $400 a year, which is less than I was paying for my rental of a reverse osmosis system. Cheers to delicious and healthy water!