Product review (3 stars): Is this really better than the HWF75?
In other reviews I read that this will last longer than the honeycomb with the black covering (Holmes HWF75).  That filter has a very short life span, usually two to three weeks even with proper cleaning and rotating daily.  When I received this, the box has a NOTE:  Air Filter may slightly decrease humidity output.  My experience after four days is that the HWF75 maintained the humidity in my living room at 44-47%.  This filter has never been able to get it above 40%.  Not sure yet how long it might last, but it's not as effective and it costs quite a bit more.

I've been using this a week now.  It's still at the high end of filter check.  The filter is completely wet all the time.  The HWF75 was only wet on the submerged part.  I've now had to move the humidifier from low to medium.  At low it had gone down to 33% humidity.  At medium it's still only getting to 35%, while the other one was in the mid to high 40s on low.  This might last longer but it's not putting out enough moisture to keep the house where it needs to be in the cold, dry winter.