asy, breezy way to dispense your essential oils. Because it doesn't use heat you don't have the mess nor the worry of overheating or burning the oils. There are so many variables with settings and the like I can't see why some complain about how it disperses the products used. It does a wonderful job!Some users complain of not being able to smell the oils they use in this diffuser. That might be due to the type of oil, the intensity of what they're used to, the size of their rooms or their house size overall, the oils they purchased, or their own body chemistry. Unfortunately some people are incapable of smelling certain fragrances due to genetics, olfactory issues, household cleaner residue or neurolgical problems. I'm a physician so I'm well aware of how these factors can influence scents and smell. Then again, some just prefer the intense smell that lamp-rings or candle-type diffusers produce. I get that. And although I love intense good smells I don't like the hassle of dealing with those types of dispensers.Hopefully I won't have the issues that some users have described, (clogged, stopped working for no apparent reason, et al). Since receiving it (along with its less expensive version, the Hubmar) I have used them extensively non-stop with a variety of essential oils. Not one single issue has arose, none!