I got it as an extra intake fan and so far I believe it does its job well. It has relatively good airflow and even though it runs at maximum all the time, it is almost silent.

At this price, clearly the best fans one can find are the Arctic ones. I replaced some "be quiet" ones with these and my head became quiet.

Awesome value for money little fan for the case. Personally, out of curiosity alone, I chose to try them out and put two of them on the top of my build. I have them running constantly at 100% and they really can't be heard (or if they can be heard, it's so low that their sound is completely covered by the CPU cooler and front fans). Good construction (they have weight) and for no reason do they give a "cheap" feeling. Like all fans, they were easy to install and the cables have sufficient length for proper cable management. Honestly, at 4 euros each, their price is unbeatable in terms of value and quality - performance. Get them without fear!

The quietest thing I have ever bought. In my opinion, this specific company produces the best case fans in terms of their prices. I have bought 3 of these. It also comes with an 8mm guarantee and a 5-6 year warranty.