Product review (5 stars): Very Pleased-Bought Again!
This is the second time I have purchased these filters for our Samsung French door refrigerator. I write the installed month and year on the end that is visible with the filter installed. The last one I removed was in use for 20 months before I noted a change in water taste.  We are a 2 adult household and we do not drink our awful tasting water (municipal utility district) from the tap!