The best feature of this humidifier is that has a super large fill flap on TOP of the machine. You no longer need to take the tank off, drip water everywhere, unscrew the lid and refill the tank. You can just add water directly to the machine. Breakthrough!  It also has an essential oil tray which is great.  The mist output is great from this machine and has been a nice addition to my apartment in New York this cold winter.