I have been using this humidifier 24 hrs/day for the past 2 months. I use it in a 320 sq ft room that is occasionally closed off by doors and is heated by a wood stove. It maintains RH about 38% which we find very comfortable.
                    Pros: very quiet, good output, easy to refill, easy to operate
                    Cons: small reservoir requiring 3 (although easy) refills a day and the electric cord is on the same side as the mist output. This makes it less attractive if you place the mist away from the wall (highly recommend) and could make the operating controls more difficult to reach.