We have been using Filtrete Allergen Defense filters for quite a few years. At first we noticed a big difference in the amount of dust accumulating in the house. Now I expect it and if we don't change the filter on time I notice more dust around the house.
I've been using these filters for two furnaces since 1989 without any difficulty. They do an excellent job of cleaning the air as I had tried other brands on several occasions because they were (and didn't turn out to be) a better deal. What is meant by didn't turn out was that dusting was more often needed when they were in use. I have made Filtrete the only air filter that I use!!!!!!!!