This humidifier is awesome, large tank equals less frequent fills. Straight forward operation and clean. Only draw back is the water level gauge is hard to read...maybe a waterproof blue light in the tank would help illuminate the sight gauge. Stating this because we have over filled it a couple of times, but that's on us...it would help if there was a tank light. Even holding a flashlight to the gauge it is hard to discern if the water is full...maybe it's old eyes.