Product review (4 stars): Genuine OEM filter
It is what it is.  It keeps that white film from forming on the furniture at least for awhile.
If you have very hard water I suggest you get a faucet mounted water filter and use it for all the water in your humidifier.  Once the water has less minerals this cartridge should last up to 6 months or so.  Without filtered water this filter is only good for about a month.