Product review (4 stars): No problems
Due to samsung's extreme prices, I've tried three different "off" brands: one did not fit and one fit but is no longer found.  So I tried this one from Waterfall.  It's great!  It installed easily, fit perfectly, and had almost no carbon residue when I ran water through the first time.  I will now order several more and keep them in stock.....just in case they disappear, too.  Great product.