My husband and I have allergies. We have a large area because our bedroom, bath, and walk-in closet are connected. After researching several air purifiers, this one covered the area size and was a reasonable price. It was easy to set up. It's barely noticeable because it sits against the wall and is very quiet. It also visibly reacts to changes in the air environment in the room. Very satisfied with it and all the products I've purchased from Bissell. Bissell has become my "go to" company for my air and home cleaning needs.