Product review (4 stars): Keeps house humidity up when the weather dictates the furnace must run.
Good quality humidifier wick.  Kind of expensive but no worse than anywhere else.  Wish they could figure out how to keep this from accumulation black mold.  I use vinegar in the water, have tried purchased items to avoid that problem, but it persists.  Hoping for technology that will stop the mold.  These are too expensive to change as often as needed to avoid the mold.  Would welcome any ideas.