Product review (4 stars): Some problems, but not going to knock it . . . too badly.
So these filters are too large for our Bionaire humidifier.  However they were relatively easy to cut to size with a good pair of kitchen scissors.  I rinsed the filter thoroughly before putting it in the humidifier, because I remember the OE filters stinking up the room when first used.  So the odor from the filters was acceptable after rinsing them

The only real complaint I have is that they come in a 3 pack.  The humidifier uses 2, so why not sell 2 or 4 to a package?  I suppose I could have purchased 2 packages and received 6 filters so I would have 3 pair for replacements, and I'm fairly certain that is part of the company's efforts to try to get you to purchase more.  Other than the odd number of filters, they do what they are supposed to and are definitely more sturdy than the OE filters that my humidifier was supplied with.