Product review (5 stars): Totally worth buying
All 4 came sealed up tight... I went to remove my old filter which I changed about 6 months ago and low and behold it was the same brand (I forgot I had bought one to try - previously only used GE filter but seriously expensive). I have had a great experience using this brand and recently with the hurricane coming I placed some water from the fridge (filtered and dispensed through the door) into container in the freezer and it froze Crystal clear so I'm under the impression that the filter (even at the end of it's usable life) still did a great job of removing particulates.