Product review (1 stars): Not very effective
Not sure if this filter is doing anything. The tap water in Woodinville Washington has about 28 parts per million (ppm) when measuring total dissolved solids (tds).  Measuring the water filtered with this filter I get 27ppm tds.  Not sure if paying $50 makes sense when safe level is 800+ppm, tap water is 28ppm for Seattle suburb, and this filter only reduces 1ppm.  I'd expect the TDS to be 0 for what this filter is commanding in terms of price.