Review on Enhance Air Quality with FilterBuy 20X23X1 Pleated Furnace Filters by John Murphy

I received the filters in 2 days so I have to rate this as excellent. As for the filters, they appear to be long-lasting, high-quality filters that are worth the extra cost compared to the flimsy Walmart brand. I'm not sure how long they will last because it's not listed anywhere. I think I will have to change them monthly. I know some of the other comments said the filters should run 3 months each making this pack of 4 a year but I highly doubt that. The filters also don't have built-in notches or knobs on the end, so I'll probably have to pry them off with a screwdriver or pliers. Otherwise I'll probably order them again.