I have had a couple cool mist humidifiers in the past but this is the best one I have had. It is so simple to put together the few pieces need to assemble. Filling the tank can be done by removing it or bringing the water to it directly , Just raise the lid and pour it in. No more trying to fill it from the bottom. Very quiet operation so you won't even know it's running. The controls are a one knob turn to your desired output simple as that. There is a tray if you want to use essential oils for added calmness to the air. I would highly recommend it