The Shark Air Purifier with True HEPA is really wonderful! I was very please with how quiet it is and how lightweight! I've used it in a couple of rooms and it seems to really make a difference in the quality of the air in that room. I suffer from allergies and having it in my bedroom at night has helped my sleep tremendously! I haven't woken up stuffy and miserable since I started using it. I would definitely recommend this product to my fellow allergy sufferers! It has a very large radius that is cleans, which I also love as our room is fairly large. Great product!