This is a nice looking and small, perfect size as not to hog a lot of space. It comes in two settings of high or low but with two more settings  with the night light option. Its pretty quick which is a big bonus for me when I’m on the phone or try to concentrate.  It also has an auto shutoff when water level is low, another plus. About a 10 hour run time on low for a full tank of water.  So far so good however I am worried about calcium deposit build up (It does come with a cleaning brush). Sadly no essential oils can be used with this unit.