Inexpensive but effective. A bit noisy.
For a small, inexpensive unit I’m very happy with how well it keeps the air in our large bedroom fresh-smelling. As other reviewers have noted, the fan is louder than I expected but not obnoxious. Sort of a white-noise generator. The unit has a blue light also, so I’m glad I have a recessed cabinet alcove where I have the unit. The light is mostly out of sight. If the sound/light is bothersome it would be easy enough to use it on a switched outlet and turn off at night, on during the day.
Rating: 5 stars