Product review (1 stars): Doesn't work -- at all -- in my Samsung fridge
I thought I was being clever and saving money when I ordered this thing.  Unfortunately, the result is that I'm out $20.  (Due to family visiting and other chaotic life events, I didn't return it within the 30-day window, so now I'm stuck.)

The unit is physically smaller than the Samsung DA29-00020B, which, I understand from other reviewers, can lead to it banging around in its spot when water is run through it under pressure.  I couldn't even get that far, myself, as the nozzle on my Water Sentinel filter is apparently defective or a bad design, and it doesn't even allow water to flow through it at all.  I installed it with great difficulty in my fridge, tried to run some water, nothing happened.  I'm not very mechanically inclined, so I thought maybe it was me.  I took it out, put my old Samsung filter in.  Samsung worked fine (and clicked into its spot much more easily).  So I put the Water Sentinel filter back in.  Again, it was much more difficult to install than the Samsung, and again, water would not flow through it.  So I had my husband try it, and then my dad.  No one could make this stupid thing work.

Maybe I just got a lemon, and this aftermarket replacement would work for you, but my advice is to just stick with Samsung and save yourself the hassle.  If you want to save money, run your Samsung filters longer.  They'll do the job for more than six months, anyway.