Product review (1 stars): Waist of MONEY
Nice concept for the humidifier, with that being said; having to replace expensive filters that you have to buy from Holmes is crap.  They don't last wort a darn.  I buy distilled water and the filters still don't last.
I give up and am just going to trash it and buy a different humidifier from a different company.
To bad they won't just refund my waisted money.
Buyer beware is all I have to suggest .