I like this humidifier, it's quiet, runs about 12 hours with 1.5gal on medium to high. It's easy to clean and refill. I was, however, disappointed in the "aromatherapy" function as it does not in any way add the oils to the humidity. It's a very small tray with a tiny pad that sits on top of the humidity spouts (is not connected to humidity flow). I put a ton of oil on the diffuser pad (more than I add to my other diffuser) and I can hardly smell it. It's probably supposed to work through being warmed from using the hot humidity setting, however, it barely diffuses. The hottest setting of the humidity isn't hot enough to warm the oils. So if you are looking at this for it's supposed ability to diffuse oils as well, I'd look at a different unit. If you're not interested in that function, then this humidifier seems to working very well.