I have two of your Eva humidifiers now and they are absolutely the best room humidifiers I have owned. They are easy to fill, they are super quiet and they work really well.  I love the antibacterial filter and the way it will run until the filter is dry so there's no mold growth.  There is no white dust on everything.  I have hard water, so I have to buy new filters a couple of times a year.  Other than that, they are super low maintenance.