This is probably one of the best air purifiers I've ever had the pleasure of using. It is quiet, space-saving, and extremely efficient. I've been using this air purifier now for about three weeks and already I've noticed that there's significantly—and noticeable—less dust and danders on all of the surfaces in my primary bedroom. And the air even smells fresher! I highly recommend this for anyone in the market for an air purifier. Trust me, once you've had a chance to try it, you'll also stop looking. This even has the versatility to be put on its side (as opposed to standing up) on a bookshelf or any other flat surfaces.