works well [SEP] i got this diffuser just before a weekend trip so i took it with me did not use the oil with the diffuser have my own the diffuser worked well in the rental condo it smelled musty when we arrived so i put the diffuser on with a couple of my oils in the living room area approx and by the time we returned after dinner the place smelled great so it works well and a full water reservoir lasted several hours the light was too bright at night for us but holding the button down a few seconds turns it off read the directions i cannot speak about the oil that is included but lavender is always a safe bet and is so universally pleasant healthful my only mild unhappiness is the follow up emails reminding me to leave a review that got a bit annoying though had i unsubscribed right away they may have stopped also there are other diffusers that look the same for a lot less not sure about the quality differences as i have not purchased any of those to date