a fair diffuser [SEP] i have been diffusing essential oils for almost years ever since i purchased my first diffuser from whole foods back in the this diffuser is not representative of the latest generation of diffusers but it fits nicely within the last generation the latest generation of diffusers are not waterless cordless rechargeable and portable i have both types of diffusers in my home and much prefer the latest genthis is a nice diffuser but is slightly more expensive than it should be even with the ceramic appointments like all water diffusers you put water in the chamber with a few drops of oil and let it go the light is nice but does not serve much purpose other than to remind you that the unit is on when you cannot see the cold steam i am not a fan of the whole thing being lit because it does cause me to take a second look if my eyes slightly open while i am sleeping i prefer a thin band of light of course on this unit you can turn the light offit does not come with any oil which is actually good i find that when an oil is included in with a diffuser it is often the cheapest brand around and smells awful it might be enough to turn a newbie off of diffusing if they do not know that high quality oils exist i recommend plant therapyi do not buy into the claim that this can be used as a humidifier because the output is just not strong enough after shut off there is always water still left in the chamber this is not a good thing because if you want to change oils you have to diffuse water with vinegar for a couple of run throughs and then wipe down the inside of course there is nothing wrong with left over oil if you do not mind a blend but sometimes i want one pure smell for a specific purpose