Product review (5 stars): So far, so good. Time will tell for long term performance
I've been using the Samsung filters and they have worked okay, but are very expensive. Also, water flow decreases significantly when the Samsung filter needs to be changed. After reading all the reviews and doing some online research I gave this filter a try. I bought only one as a test, and so far so good. I noticed that the O-ring on the Korean made WLF-20B is slightly less robust than the one on the Samsung filter. As a precaution, I applied a small amount of drinking water safe silicone plumbing grease to the o-ring. I flushed the system as recommended, and we now have a nice strong flow.  Taste is good and the slight chlorine odor in our unfiltered tap water is gone. Time will tell if this filter gives consistent performance and adequate service life. If so, I'll stock-up.