I find those cabin filters don't work so well when you cruise with the windows down.
That, and every time you open your doors, stuff can blow in. It would just be nice to have a filter for those times you can see it's dusty or have to drive through a dusty area, then you can at least seal up the car.
Cabin filter arrived today. Cost all of $20 including shipping. Perfect size like the old one and at 1/4 the price. It was not the easiest thing to replace as you really have to get in there LOL. Man the old one looked pretty filthy,