Product review (5 stars): Great Price
I searched high and low for these filters.  Great price.  Cheaper than on the manufacturers website.  They fit well in my humidifier.  I've used it now for more than 30 days.  I run the humidifier each night and no issues with the filter.  You definitely at a minimum want to clean the humidifier itself at least every 2 weeks to get the best use out of the filter.