Product review (4 stars): please read the update
i was wooed by the price and reviews, but after 2 weeks of use in my honeywell humidifier, the filter is yellow and brown which, for me, means it's not good enough even if it was free. i've used a honeywell-supplied, higher cost filter for over a month in the same room and it isn't even light yellow. with inclusion of a bacterial control agent, perhaps these generics will do the job, but i'll stick with the proven honeywell filters.

UPDATE
apparently i had a bad filter. a few weeks later i added another humidifier to my house and used the 2nd bestAir filter, just to get rid of it. well, now it's maybe 6 weeks later and, even though it's a tad yellow, it's fully functional, so my guess is that my first review was misleading. i whacked the product undeservedly.