Product review (5 stars): Genuine filter from Samsung is worth the extra cost
Sure, I wish these OEM filters from Samsung cost a little less.  But they work as advertised, and I trust them.  The one non-OEM filter I tried (<a data-hook="product-link-linked" class="a-link-normal" href="/ReplacementBrand-Samsung-DA29-00020B-Comparable-Refrigerator-Water-Filter/dp/B00TR77DZC/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">ReplacementBrand Samsung DA29-00020B Comparable Refrigerator Water Filter</a>) would not even fit into the nozzle of the Samsung refrigerator correctly, and I had to throw it out.

One other thing - multiple reviews of third party filters will mention how they love that the "water flow is so much better than with the Samsung filter."  To my mind that means either (1) they are comparing a brand new third party filter to a used Samsung filter, OR (2) the third party filter is doing a substandard job of filtering the water.  I would also note that the Samsung OEM filter is NSF 53 certified, while none of the third party filters I've looked at have this certification (most have no certification at all, and one I found was "independently certified at NSF 42" but has no NSF emblem on it).

In this case I believe that a genuine filter from Samsung is worth the extra cost.