Product review (5 stars): These cost half as much as the official Honeywell filters and last more than twice as long.
I don't know if it's because of the metal support grid inside them, or if the paper is just more durable, but I can get one of these to last me an entire month or longer, where the Honeywell branded filters would disintegrate after a week or two. I also think they smell better than the Honeywell brand filters. I do have to flip the filter once a week, as mineral buildup from our tap water starts to hinder the wicking capacity, but this was true of the other filters as well.