I've posted this before, but here it goes again..
I've been using the Quaker State filters on 2 vehicles for several years. I have never cut one open, so I can't comment on media issues.
On a Geo Prizm, the ADBV was failing somewhere north of 5k intervals.
On a 96 Camry, I have run the filters out to about 5800 miles, and they have been fine. I have probably used about 10 filters on this particular car.