Product review (4 stars): Good Quality - Great Price
We received these filters just as advertised and the first one works like a charm.  I have not noticed a difference in the water quality, taste, performance, etc. of this filter vs more expensive filters.  If only one of the remaining three filters works, I'm still ahead of the game cost-wise.  At this point, however, there isn't a reason to think that I will have a problem.  The filters look very well made; they arrived plastic-sealed in individually sealed boxes.  Inside each box is a plastic-sealed filter with a covered opening where the filter attaches to the refrigerator.  The box indicates the filter usage period is 6 months, but your mileage may vary.