Product review (5 stars): Good for us!
Fits perfect, good water flow (maybe better than the Samsung one), at a price you can accept.  It's all good!  Yes, they are NSF 42, but unless you are on well water that's plenty good.  If you are on well water, or any water supply that could contain heavy metals or arsenic, pay the price for the genuine Samsung filter which takes those out.  For the rest of us, these are a great buy.