Product review (3 stars): Too pricy
We started out replacing the filter when the refrigerator light went red, filter replacement time.  After a year or so we realized this light is on a timer not sensing when the filter is clogged or otherwise not working properly.  So we waited another 6 month to replace it again and had the water tested and it was fine.  The fact every fridge with water feed/ice making has this type of filter and an electronic timer to indicate when it is to be replaced is a big business for who ever sells the filter; including Samsung.  We do replace the filter every year now and do not buy the Samsung filter since it is too expensive and the alternative, one purity or HDX, we use filter the water to same quality as the Samsung filter.