I am very happy with my conair purifier! It's quiet enough to keep it running all night long in my bedroom.I like that it will stay on until I turn it off, unlike others I've seen that work on a timer by the hour. It's size is perfect to fit on the side table next to the bed.I really like the dual position design you can use upright with included stand or lay flat on side.It's not too big or bulky. I have noticed the air smells better than before. So I guess that means it's working.there is 3 fan speeds with touch buttons.overall I m very satisfy.