Product review (5 stars): works well, don't buy a knockoff.
I  first tried to by a discount filter that was supposed to be compatible, which ended up being defective. I don't know if it was just a dud, of if the discount ones don't work as intended. I then gave in and got the Samsung one. It worked perfectly. Pricier, but it worked, so it may not end up saving money buying a knockoff.