I chose an air humidifier for a long time, settled on an ultrasonic one. They brought it very quickly after ordering, it was packed in a factory box, the equipment was complete (cord, humidifier, instructions). No complications, simple controls. In terms of noise, you can hear it, but it works calmly, without harsh sounds and gurgling, you sleep with it definitely better, easier, which is very important at night, it calmly copes with moistening a room of 30 squares. Does not leave stains, does nSee full review