I replaced a fan that was making a lot of noise. It is slightly noisier than the old one, but nothing significant. Very good cooling for their price and with nice lighting. Maybe I will replace the rest someday for more uniformity in the case. I recommend them for something simple and good. However, if you want something more professional with more money, you can find much better options, of course.

Satisfactory noise, quite quiet for its price, speed and airflow, as well as powerful LED lights.

The cables are only somewhat short, so do some research on the length of cable you need.

I don't have any other negatives to point out besides the cable length, but that is related to market research.

In case of using a fan controller on mine (tower), the LED lights only work at maximum power.

Overall impression: a very good choice for low-budget fans, for those who don't want to spend a lot of money on basic cooling, without this meaning it has ineffective cooling.

For any problems that arise, I will update this comment.

Well, I got this one to add some beauty inside the case. It cools well and has good airflow. As for sound, I don't hear anything. The LED lights are very satisfying.

Overall, it's a stock fan with LED, for 4 euros, I can't complain.

Photo of the LED:
https://imgur.com/t7Jo4Jz