This diffuser is amazing! It runs for a very long time which I love. My other diffusers are much smaller and I have to refill them more often. The colors are bright and beautiful. It has many settings, so you can make it constant or intermittent. The lights can be turned off while the diffuser is running if you don't want them on. It has a remote also which is a great added bonus. I would absolutely recommend this diffuser, I have 3 and it is probably the best one I own!