It's great, small enough for a bedroom and very quiet. Even on higher fan speeds, it doesn't make too much noise.  I love the auto function, the purifier goes to bed with you. All lights turn off except this little Zzz marker. It's so cute.. It's like a robot :3. The main reason why I got this was for myself and my parrot. Because we both spend a lot of our time in here it can get very dusty and the air quality was getting pretty bad. I would wake up with a sore throat and completely clogged nose. Ever since the first night, my symptoms are completely gone. I'm also not too worried about the replacement of the filters as they don't require to be changed very often. I think it's definitely worth the price.