My bedroom gets stuffy even with windows open causing some degree of dry eyes every morning, with this running overnight it helped to moisten the atmosphere and alleviate those symptoms. I have been sleeping better, the sound is no louder than a PC fan whirring in fact it is quite a soothing noise.
Recommend people with the cold and hay fever type allergies going on give this a try, and also, it is very easy to fill up and lasts a long time, with no filters to ever change and even has a remote control and makes an ionic stream of air and cold or warm air.
One thing to note, that a jet of steam WILL start to remove/curl edges of wallpaper or affect any wooden MDF furniture (expanded the edges of dressing table) . Best placed therefore on a non porous surface .