Product review (4 stars): Great price, does the job
Cannot go wrong with the price.  The only draw back is that it does not fill up the space in the holder 100%.  It is more of a universal fit for a group of humidifiers therefore it is not a nice tight fit like the ones at the hardware store.  I am more for the price and waiting to see if there is as much mold growth as the ones at the store.  Our humidifier runs constantly therefore I go through pads more often.  This was offered at a great price and seems to do the job so far!