Review (4/5): Works well
I got this diffuser just before a weekend trip so I took it with me. Didn't 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 10'x20') 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 can't speak about the oil that's included but Lavender is always a safe bet and is so universally pleasant/healthful. My only mild unhappiness is the follow-up emails (3) 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 haven't purchased any of those to date.