Small and quiet
I have this in my kitchen and it seems to work great! There is a noise when you have it plugged in, but it is minimal and I don't even notice it anymore. We do not have pets or smoke, but I do have horrible allergies and this seems to keep my kitchen area smelling fresher and I like to think the air is cleaner as well. There is a dim blueish light along the top when it is plugged in, but since it is in my kitchen, it doesn't bother me. It isn't very bright anyway, so I don't see how it could be too bothersome.
Rating: 5 stars