Product review (4 stars): Big difference.
This is the second set of filters I purchased this year.  The original set had been in the humidifier for a full year so I purchased us a set of new ones from a "Big Box" store and they lasted about a month.  Then I ordered the Holmes ones and they have done well since December.  I will definitely buy another set next year.  The only thing that's not the best for me is that they come in a package of three and my humidifier only uses two which means I have to remember where I put the third one until next year!