I am thrilled with how well this product works. I use essential oils very often, and, they are very easy to use with this humidifier. I used 4 drops total of Ravintsara and ImmuPower from Young Living, and, after 2 minutes of being plugged in, the unit started venting its water vapor and the oils. It works for a while, too, even though it doesn't hold a lot of water. I'm very happy.
This little USB humidifier is exactly as shown and described. The cold humidity it puts out can be a little inconsistent but it's clearly a novelty item and not for serious use. It has a sturdy and stable rubber base and seems solidly constructed. It's easy to use. Adding scents is probably it's best use, but it was inexpensive and I like it.