This is very straightforward to set-up and looks superb. It is virtually soundless. The digital display gives you an instant indication of the air-quality in the room and changes over time to show how it is improving the air quality, using colour-coding which is easy to follow. Our air quality is better than I would have imagined in an inner-city area and this is re-assuring to know and of course it can/will only improve with this unit switched on which is also great considering our two young children in the house, one of whom suffers from asthma. The lovely cool fan is an added bonus as far as I am concerned!