I immediately noticed a difference when I plugged in the air purifier. There was a visible reduction of dust particles in the air. 3 levels, highest setting is very loud but I would probably only run it on high if I was cleaning or trying to remove a smell. I love that it comes with an extra filter.

This air filtration system works! Here in Alaska, with no central HVAC, there's typically no air filtration. That means lots of free-floating household dust and allergens. Before purchasing this unit I would awaken each morning so stuffy I could barely breath and my eyes would itch like crazy. After one day and night with this unit operating at full speed I was breathing and sleeping much better. After a week I have no more sneezing and stuffiness. The Germ Guardian works quietly, efficiently, and I highly recommend it!

I am very satisfied with this product I would buy it again

Very nice air purifier. It has multiple speeds and does the job very quickly.

It made a rattling noise.

I am happy so far with my system.

Great defender from germs dust etc

Air is much cleaner now, seems fresher.

Extremely happy with this air purifier. Very quiet & Energy Star rated. Bought 3 & no problems.

I've just been using it for a short time, but it seems to work good. I put it in a smokers room and it seems to help.