I was so excited for this to come in the mail. I had a oil diffuser before, but it only worked when it wanted. This lights up and changes colors gradually. It comes with a plastic cup to fill the water with, so you know you’re filling it accurately every time. Plus, you don’t have to unplug it to go fill it, or guess with one of your own cups. It lasts a while with one cup full of water. It does everything it says it does, arrived in great condition, and on time. I will be ordering a second one for a friend as soon as possible!