Product review (5 stars): Plastic matrix rather than metal, last longer than OEM and are easier to change
I had been using the OEM Aprilaire metal matrix humidifier pads for years. I changed them twice a season and the coating on the wire mesh would powder off and the metal matrix would rust. I would spend 15 minutes cleaning the humidifier compartment off all the dust and I accidentally dropped a used one and it looked like a chalk outline from a crime scene.

The OEM pads have sharp metal edges and are more a challenge to change because it can be difficult to get the top of the frame in place over the metal matrix OEM pad.

The Honeywell HC18P pad is made with a powder coated plastic matrix and I used one all last winter that I just changed now rather than two. The Honeywell pad was a little discolored from minerals in the water but it was "de-powdering" itself like the AprilAire OEM pads did.

I'm very happy with the switch from EOM to the Honeywell pads - highly recommended!