I think the machine really good, it moisturizes really very fast. I use the device with a timer, with the unit I, depending on the humidity, either'm running 15 or 30 minutes. The device is used in my bedroom, a full size Single bed room. I can see the reviews just do not understand is where claims that Device creates hardly, to not more than 2% more humidity. If I in the unit Winter use (in my room there after the airing in the winter, according hygrometer a humidity of about 40%), it creates in less than half an hour Raise humidity of 40% to 60%, you really have to be careful that you would be turned on for too long, as the room really mutate into a stalactite cave would, in the winter always drops on the windows are deposited during the operation, which, however, hardly be avoided.
The volume is passable, but the device is clearly audible, but you have the power not indeed turned alzu long. I do it partly so that I use the timer to Humidifiers about an hour after I fell asleep, let on.
What you should say is that the device has a relatively high power consumption, however, infected already behind and performance. I would operate, particularly in small rooms, only recommend with a timer, because you should forget the machine off again it can quickly lead to water damage times, especially when electronics (eg Notebook) is in the space.