These are nice humidifiers. I have two of them and they do a good job at keeping my apartment comfortable. I would give them 5 stars except for two negative issues. They appear to have been designed with an emphasis of aesthetics over function. The water level window is in the back of the unit so when I refill it with a pitcher I need to be in a very well lit room or use a flashlight to add the correct amount of water. The other issue is the evaporative filters. They are only available through the manufacturer and are always out of stock. I bought my first humidifier two years ago and it took six months to get a new filter.