Very good fan in general.
He provided great air flow and a very good static pressure.
Fairly quiet in general but become audible from 1000TR / min. Having a high static pressure that the fan is audible.
The finish is quality.
The supplied package is the one sought for a brand like Noctua.
Highly recommended for mounting cooler thanks to these characteristics.
And very good for housing ventilation with reduced speeds (which still provide a very high air flow).