The build quality is quite ok and the device is already regarded. Whisper quiet is at far and also no advertising so that should be made, because that is simply not true. At night you really can not sleep next to this noise .. Therefore, 1 point deduction because I ordered the unit because it was described as "very quiet".
1 additional point deduction there because the unit was defective after 3 hours of operation .. The engine was still, however, was not a "fog" more produced by the machine ..
There are many other devices .. it does not have to be this .. buy recommendation I can therefore give for this special unit no.
