Product review (5 stars): WSS-1 replacement filter
This is the 5th of this brand of filter that I've used in my Samsung refrigerator.  All 5 have worked perfectly and delivered good tasting water for the six months between filter changes.  Perhaps they may last longer.  I changed them when the reminder indicator light on the refrigerator came on.  Be sure to adequately lubricate the seals on the filter before installation or it may lead to dripping at the delivery spout.  At about half the price of the Samsung filter, they are certainly a good buy.