I really liked this humidifier, but I had to return it after just a month. Here's why: Out of a month, there were many days we didn't use it because it turned warm and rained, which increased the humidity in the apartment. One evening I set it in the bedroom to run for a couple of hours before bed and when we went in to bed it was off. Thinking maybe it just ran out of water, I unplugged it and didn't check it until a day later. Filled it with water, plugged it in and no power. We tried many outlets and everything we could think of, but nothing. Emailed the company, explaining everything and they wrote back to send a video of what it does. Part of the email address was in Chinese. So I filled out a return ticket to Walmart. How do you take a video of the thing doing nothing? This was very disappointing, because I loved almost everything about this humidifier. The three flaws were 1. The aromatherapy feature...it gave off no scent whatsoever. 2. The humidity sensor must have sensed the humidity right next to the mist, because it was 24% in the house but it said 64% on the screen. 3. There should have been a higher spout for the mist to go upwards more, but it would just fall downward to the floor because it's flush with the top.
What I loved: slender and can be placed anywhere in a small apartment. There are recessed handles for ease of moving, even when full. Very quiet; just now and then you'd hear the pump pulling water up the tube but it wasn't loud.
I can't imagine why this unit quit working. Maybe I just got the bad one. If you want to take a chance and buy it, you might not have this experience. I sure liked it. Very disappointed.