Havent used them yet. Just got them . They seem to be comparable to the ones I got from the store. They are much more affordable than what I previously bought.
I've been trying to cancel this subscription for a while because I simply have too many filters! Unfortunately, cancelling is not as easy as signing-up. Sure, they are good filters, but be sure you have room to store extras!
I change the furnace filter once a month and you can see what gets caught. Without filter changes the heat exchanger and AC coil would get coated with dirt.