As far as our experience with the air purifier, we have had in use for approximately one month; We have noticed we have had fewer allergy concerns which is a blessing to say the least. Another area where we are pleased is that the soft lighting is beneficial as a night light as we have the unit in our upstairs hallway directly outside two of our bedrooms. The muted tone of the motor also gives the impression of what I guess would be considered
                    white noise. These two unexpected benefits make the addition of this unit a solid win.