Product review (4 stars): Great filter, but some concern with filter life.
I've been using this model filter from various vendors for at least 5 years and have found it to be a good solution for my water. I usually replacement it every 6 months when there's a noticeable drop in pressure, but for some reason this last filter is falling off substantially after just 1 month. (It was installed 11/28.)  Not sure why that would be.  I'll order another from here and update my review once it's in use for at least 1-2 months.