I have 2 dogs and have mild allergies from them as well as one of my dogs having allergies. The first night I ran this, I noticed my nose was clearer and easier to breathe! I cant say if it was the purifier or a coincidence, but I do believe this helps! I did exhale smoke in the room, and the purifier kicked into high gear to clean the air so I know it does work in cleaning the air. It is very nice design and has an auto function depending on the air quality. The top changes colors to show how "bad" the air quality is. One thing misleading with this is there is nothing mini about it! it is about 2' tall!. It says to change the filter every 6 months, but I cannot find any product to purchase.