Product review (4 stars): works well, but filters out fewer things than the Samsung original
I got this because it was less than half the price of the Samsung filter and both use activated carbon. Once it arrived I was trying to figure out whether it works precisely the same or has any differences. Here's what I found:
* Both filter: chlorine, mercury, cysts, lead
* Both have the capacity for 300 gallons, the same flow rate, comparable min/max operating temperatures
* Only the Samsung filters: particulate class I, asbestos, atenolol, fluoxetine, ibuprofen, progesterone, trimethropim (those last few are drugs; presumably this is for scenarios where people have disposed of them improperly and they ended up in the ground water)

This fits my Samsung RF261BEAESR... just the usual plug and turn (though it does require some muscle, as does the Samsung filter).