This is a great room air purifier for a smaller room - and has a HEPA filter!  I run it at night - it is great for "white noise" which actually helps me sleep better.  Has a "whisper quiet clean" setting; and even on the "high" setting, is not loud at all.  Upon waking in the morning, the room smells very fresh.  The only "con" (if you want to call it that) is that it could have been made with a handle.  This is not really an issue as the purifier is not heavy nor bulky.  I also love the fact that it can be used in either a horizontal position on a desk or dresser; or can be used in a vertical position such as sitting upright on the floor.  All in all, a great compact unit!