Product review (5 stars): Seems good, time will tell.
I was skeptical  of these but decided to try them anyway when the old ones i was using were discontinued.  I wasn't going to pay a lot more for the new ones.  I don't detect any difference in the water taste from the old ones and they fit perfectly.  I did make sure they were a direct replacement by number for the old ones before ordering.  How long will they last-we'll see.