Product review (3 stars): Not sure!
Amazon asked, "Did this meet your expectations?"  Installation was a snap, it didn't leak, etc.  So I thought great, it works, and they were much less expensive.  However, in the beginning there was a strong chlorine odor and taste which indicated, I thought, that the tap water was not getting filtered and deodorized.  So I ran the water through it several times and it seemed to clear up.  But then it came back again.  So more flushing.  It seems better now.  If it clears up and there is no chlorine odor or taste I'd give it a 5 star but until I've got to go with 3.