In use, I was very impressed with the Homedics Ellia Adore essential oil diffuser. The mist function is reliable and effective, but it's the extras that help elevate it from the competition.

If that sounds too faffy, look for a diffuser with a remote control, such as the Homedics Ellia Adore, which also includes sound effects. The Beurer LA 40 is a simple but effective aroma diffuser.