The air in the my apartment is really dry, so I was looking for a diffuser that did a good job at humidifying. This one works great! It holds half a liter so it can run for a long time. I can a just a few drops of essential oil and it distributes the scent well. I hardly use the light function, but it works fine. Easy to take the top off and refill. My only complaint is that it is a little noisy. If you like white noise, you'll be fine, but it can get a little annoying when trying to sleep.