Buy it.
We have 2 of these & are currently using them in our bedrooms 24/7.  We bought them together & 1 made a very nice quiet white noise, and the other had a loose srew or something because it made a terrible constant squeak.  We exchanged the noisy 1 & the replacement has the same pleasant white noise that helps you sleep.  The devise is gd quality,  the plug rotates in the housing so you can turn the device this way or that way.  It has a thin lit strip across the outside so plan on putting somewhere suitable for a night light.  It also has a light inside that sanatizes.  The air is definitely never stail in the rooms we use these in, whether the windows are opened or closed.  I would buy them again.
Rating: 5 stars