I’ve owned a few humidifiers, from small desktop type to big multi gallon type. Levoit Smart Humidifier is the best that I’ve ever had. I have it sitting on my large end table in my living room. At first the easy to read digital display showed a dry 30% humidity. I filled it up with distilled water (to fight hard water scaling) and the next morning it was displaying 40%, and you could tell that the air was easier to breathe. 
It has a Bluetooth capability to your smartphone, but I haven’t used it yet because the front digital display is so easy to use. It also has a drawer with a blue foam to use scent drops. It comes with many extra blue foam inserts. 
It is so easy to use, easy to fill with water, easy to see with the lit digital display (even the tank is lit), and I breathe so much easier. 
I am beyond satisfied with Leviot Classic 300S Smart Ultrasonic Humidifier! This is the best humidifier that I’ve ever had!