Review on Efficient Livatro 4L Top Fill Humidifier: Cool Mist, Ultrasonic Quiet, Auto Shut-off - Ideal for Bedroom, Large Room, Nursery. Easy to Clean, Lasts up to 40 Hours! (White) by Kate Woods

I ended up buying 2 of these and I used them for about a week. They are very quiet and I like them a lot. He is and does everything according to the description. Two things indicate proper usage. First of all, you should know that the room will be humidified for an hour or two, depending on its size. Once the desired humidity level is reached, turn it off or you'll see the room cloudy. Second, if you plan on leaving it on overnight, be sure to use a fan to air out the room, otherwise you may find your floor is wet. Spread it out and all the water will spill onto the floor. So if you have children or pets, make sure it is placed where no one will accidentally step on it.