It is indeed quiet and of decent construction, but the amount of air it emits is not sufficient. It has been installed in a pair for cooling on graphics cards and the performance is mediocre.

So I tried it for $2.
I have it as a fan on a passive cooling card and it does a very good job.
The passive cooling card normally has 35+ degrees and with the fan it has 28-29!
Now, as for airflow, well... look for something else.
Before I put it on the card, I had it as a fan to blow the air out of the case...
It's worth its money... What can I say, it's $2, what do we expect?

For the job I need it, it's fine. It has a low airflow, but it's quiet. Normally, I would have preferred a 92cm fan, but they are hard to find nowadays with the 3-pin connectors. And the ones with 4-pin connectors run at maximum RPM. Luckily, the case had holes for both 80cm and 92cm fans, so it fit perfectly

Completely silent up to 50% of its maximum speed (by adjusting the speed through SpeedFan, for example). Above that, it becomes noticeable but even at 100%, the noise is discreet. Another advantage is its relatively low price, as well as the fact that it has both a 3-pin and a molex connector, for connection to the motherboard or directly to the power supply, respectively.
On the other hand, the amount of air it moves is low/medium compared to more expensive models. Also, there is rarely a need for a fan of this size (80mm) nowadays, as most modern cases accommodate 120mm fans and above.
For someone like me who has an old case and needs a silent fan, it is just what I need.