Product review (5 stars): 2 Pack
I'm not sure why I buy the 2 pack vs the 3 pack, but the ones that come in the 2 pack work just fine. I have a Samsung Fridge, and even though the 2 pack don't show the samsung label, they hook up just fine and have never leaked on me or blown out putting grit in the system.

Knowing how much water I tend to drink or use from the Fridge, I know that the Samsung's "Filter Monitor" is purely based on time from the last time I cleared it. And not actually the quality of water coming from the filter. I usually let each filter stay in the fridge for 2 months after the Monitor light turns red (so about 6-7 months total), and the water is just as clear and clean. I could probably go more months, if I tested the water myself to know when exactly a filter is done with.