Product review (5 stars): Works good enough.
Push old one out, plop this one in, hold reset button for 30 seconds, let the water run for 5 minutes, done. Hmmm... too simple ...
Checked with my TDS-4 tester 3 times each to compare
- Tap water: ~250
- Old WF3CB filtered water: same as tap
- New WF3CB filtered water: ~205
- RO5 filtered water: ~5

So it does its job of removing some impurities. Obviously not a fair comparison against RO5 but I thought that would give some perspective on the quality of the filtration.