Let me say, I absolutely love this, except for one thing. Good.... It does seem to clean up the air... Haven't woke up with a headache since I got it. It is so quiet I don't even have to use the silent feature. The only thing that is a problem for me is that the air flows out the top not front. I have cats that like to jump on it. When I turn it off I have to cover the top and unplug it. This is not a product flaw, just a problem in my household. Other than that I cannot recommend this highly enough. I am glad to have it