Product review (5 stars): Works for me
I have read a lot of reviews that say how quickly the filters wear out.  This is the first humidifier I have owned so I have nothing to compare it to.  I do not use this everyday, only at night when my children have colds/mild seasonal allergies so the filter seems to last long enough for me.  I took the advice of another reviewer to only use as much water as needed at night and then keep the humidifier running until the filter is dry.  Works great.