First it looks very nice, well made. It improves air flow and service life if you do a previous run-in for 3 hours as instructed.
As advertised it gives an impressive air flow with very good pressure. I think is the best fan out there.
It works so great that I bought one for my motor and will buy another for my ESC. Reduces temp so much that you will never have problems because of overheating. And also it improves power as your ESC and motor work better.
It vibrates a little, but a lot less compared with other ESC or motor fans
Totally recommended. A must buy