I love this air purifier! We have two living room areas and will purchase another for my other living room! It is so quiet and this room is less dusty after a month of use! 
Like I said, it is so quiet...a light mum which I prefer! I have recommended this to my father and in laws as well!
If you are in the market for a quality, not overly priced , and quiet air purifier, this is the one!!