Disappointed in the number of pleats in the 2" filters. upgraded from 1" to get more surface area. Haven't don the math yet, but will, but I am pretty sure the 1" filters I have been buying have more surface area. Other than that I saw no issues. Haven't used yet.
We live in the woods, with lots of garden around the house. There's lots of pollen in the summer, and dust and normal airborne allergens in the winter. We had all been sniffling, even the dogs! But I switched to these filters about a week ago and yesterday we commented that we are all sniffling less. I can only assume it's the filter doing its job!