I was looking for an inexpensive oil diffuser, that just did what I needed it to do. I purchased this one and I am really glad I did. It's extremely easy to set up, just pour in water, drop in your oil, place the lid and cover and turn on. Simple and easy to clean as well. I love the color changes and you can even make it stop on one color or in between colors to 'customize' a color. I like that I can use distilled or bottled water in it and it works fine. The directions say to use tap water, but our tap water is horrible and I'm sure full of stuff I don't want in the air and breathing in. I've had this unit for several weeks now and run it everyday. I love it!