Mr. John

Expensive but definitely worth it. I happen to be blessed with actually pretty good tap water in Western Washington, with my TDS meter I got a reading of 80.0-90.0 TDS unfiltered tap water. It is pretty high in chlorine though. After setting up with very easy to understand instructions I measured my now filtered tap water and got readings in the 0.5-0.8 TDS range! Talk about pure water. Of course, the chlorine odor was gone and it was tasteless. I purchased the waste reduction option but did not have the time to try it out. It does waste allot of water as the only downside I can think of, but I use that water on my lawn so it is really not wasted.