I purchased this item to help my night allergies and my 2 month old's blocked nose. It did the trick pretty quickly and I now have it on throughout the day. The low setting has a tolerable noise level-like a fan, but the other two are loud in comparison, hence the"on through the day". It is too loud to have on at night above the first setting. It comes with an apple scented block which is lovely while it lasts, unfortunately that's not long, but I expected that. All in all very good as it's made night time bearable again. I would buy more of the same for other rooms.