The humidifier manages the humidity in an approximately 18m2 large space to 45% to keep. It is extremely easy to clean as there are only a few parts. The absolute highlight is the use of PET bottles, the cleaning of the water tank thus eliminating as it can be so easily changed by a new bottle. The strong blue LED bothers me little good that it changes to red when the water is empty, which is also visible. By eliminating the fog ... I only use distilled water, which makes impossible a calcify The small device is easy to store in the bag supplied. I love it :-)