Product review (2 stars): Replacement filters only meet the less strict NSF42 standard
All  Samsung filter replacements I could find only meet NSF42, whereas the genuine Samsung filters meet NSF53.  The difference is significant.  NSF42 only covers aesthetic taste and odor considerations like chlorine taste and smell.  NSF53 is a higher level standard that covers reduction in heavy metals, organics, and inorganic contaminants.  This is why the genuine Samsung filters are more expensive.  If you are confident that your municipal water supply is uncontaminated (and I believe all municipalities have to issue annual reports on tests of their water - check yours) and your only problem is a chlorine taste and/or smell from the water treatment process, use the cheaper replacements.  I'm sticking with the Samsung filters until I can find a cheaper alternative that meets NSF53.