Product review (4 stars): Product seems fine, but one filter missing O-ring
Received these timely, but when I installed one it leaked.  I tried to adjust it in place, I removed and replaced 2 times, but it still leaked.  I removed it completely and noticed it had no O-ring on it.  I opened the other box, verified the O-ring was on it, and installed it with no problem and no leaking.  So, I removed the O-ring from the Samsing filter I had replaced and put it on the first filter I tried to install.  It's now awaiting its turn in the fridge.