Product review (4 stars): A reasonable replacement for the Samsung filter.
To quote the company's write up, "The ReplacementBrand RB-SA2 is a comparable replacement water filter for the Samsung DA29-00020B, HAFCIN, DA29-00020A, AP5271937, Aquafresh WF294, and Water Sentinel WSS-2 Replacement Water Filters."
Since the life of this product is projected as about 6 months, I am unable to review the life expectancy at this point.  I have entered a note in my calendar to update in February 2016 - or later, if it is still doing it's job.
At this point, I can only state that the ReplacmentBrand RB-SA2 filter appears structurally the same as the original filter by Samsung.  It inserts readily into the filter opening of the Samsung refrigerator and locks correctly with reasonable effort.  Draining the air from the water line went smoothly, with less air than the previous times I have replaced the original filter with a Samsung brand filter.
I do not have the ability to test for chemicals in the output water; taste at this point is good.