REPLACEMENT FILTER CARTRIDGE Lasted about two months as advertised. Tested pH once a week with Phinex Diagnostic Ph Test Strips, reading from 9.0 in beginning of July to 7.0 at end of August. This was my sixth time around. Had a major problem getting water to go through the filter properly. Very frustrating, until I decided to follow the suggested method by Brita (a brand I used before switching to Life Ionizer): Completely submerge filter in water for 30 minutes before installing to pitcher. Worked wonders! Convenient and cost effective with Amazon Prime.WATER PITCHER Functional, nothing fancy. Digital counter does NOT work. I called my local distributor for a replacement part, but they simply recommended to make a two-month note on my calendar to replace the filter. So, it seems to be a manufacturer's flaw. Disappointed there for awhile. Health benefits far outweigh any ill feelings.