Been purchasing these for a few years and replace each quarter or as needed. When I look at what more dust is trapped I cannot believe how mush stuff the old filters did not collected. Would recommend these to anyone.
I've been using this product since my allergy diagnosis and it really works; good for three months; so much easier than monthly types. Definitely worth the purchase price.
I couldn't really tell you what it's like to use an inexpensive filter for my air conditioner because it's been so long since I have. I do know that these filters are quite durable. I feel like they keep the dust down/trap more dust in the air, but I don't know a way to accurately measure that. I feel like they are usually very reasonably priced for a good filter.