The quality seems comparable and the price is excellent. I only wish these manufacturers would only sell small engine filters in large replacement packs that are flat and trapezoidal in shape. These fall apart the quickest because they don't hold up to too many washes, and I mean hand wash. You're just too skinny. Other than that, all the filters work as expected, and the availability of accessories allows you to wash the filters more frequently (I live in a busy urban area where dust and street grime are constantly in my house) without having to wait for the cleaned filters are empty. Dry. Because you can put in clean add-ons while the dirt is being cleaned/dried.