Not THAT noisy; works but not instantly
I was a little skeptical at first. I currently have a nuisance neighbor who is smoking in their apartment. It is seeping into my apartment causing a very strong smoke smell. I plugged it in and came back to the room a few hours later and wasn't impressed with the air quality. However, I left it plugged in all night and there was a significant difference in the air quality. There was still a faint smell, but it took care of 90% of the smell. Some reviews claim it's noisy, but to me it is much quieter than the exhaust fan I had to keep on 24/7!
Rating: 5 stars