Product review (1 stars): Very Confusing Situation
Appeared to fit properly (in Samsung fridge), but leaked. Reinstalled several times, but still leaked. Just bought the much higher-priced brand name product (which had worked before). Here's hoping.
Post Hoc:
A  month has gone by, and the $24.95 model is still working fine. Just got a call from the seller of this (much) cheaper model (I guess it's Aqualutio) who was very unhappy with my review. He explained (if I understand) that Samsung has changed its design without changing the model  number. Some require a two-tooth threaded surface, and some a three-tooth thread.)
So maybe the product is not defective, as I had thought.
The situation is not helped by the fact that the product pictures show the filter with a red cap covering the threads. How you are supposed to know whether this will fit properly, God only knows.
In the reviews for the Samsung 00003G Aqua Pure Plus for $24.95, a number of people noted that they had to shave off part of the first "tooth" to make it fit. That was definitely not my situation. Both filters seemed to screw in just fine. But this one leaked in my application, and that is just a fact. And the model numbers are exactly the same. Go figure.
I was floored to be called by a rep on a Sunday afternoon, following up on my negative review. They obviously really want their customers to be happy. All I can say is, try the cheapie "compatible": It might work in your fridge, and you'll save a lot of money.
But be aware that it might not fit right and it might leak.