I have been using this air purifier for almost 3 weeks and it’s seems to be working great. My son has seasonal allergies and this is the worst time of year for him but his symptoms haven’t been as bad. The air in the house smells much cleaner too. I have a very sensitive nose so I normally smell my cats or their litter when I get home. That smell is definitely gone. The machine was so easy to set up and the settings are simple to use. It’s such a small device but it has managed to help my 1,400 square foot home. And it’s super quiet!