Product review (2 stars): however when they only last a couple weeks I don't feel like I'm getting my money's worth
Some of these filters seem to last a couple months while others deteriorate after just a week or two.  When they last 2 months I would give them 5 stars, however when they only last a couple weeks I don't feel like I'm getting my money's worth.  Only 2 starts due to inconsistency.