The fan, in terms of the features it offers, is excellent. Both in the airflow it delivers, the sound it makes, and the Natural Wind mode, which provides the best sleeping experience at night. Perhaps the only downside, which doesn't even affect the rating, is the lack of up-and-down rotation either from the app or from the device, requiring manual adjustment. If I judge it based on the above, I would give it 5/5.
However, regarding the quality control from Xiaomi, it is unfortunately below average.
1st purchase 02/07/2024, I received a fan that for the first 1-2 days of use was the perfect product, solid, 100% silent (you only hear the sound of the air it carries). It literally served as the benchmark for all the others that followed. However, on the 2nd day, it started making a slight ticking sound in the motor at times. Since it was within the return period, I chose to replace it.
2nd purchase (replacement) 31/07/2024, I received a product that I didn't even use. The connections between the poles and between the base were terrible, requiring force to snap together, while at the same time, the poles themselves would hit the wires inside with the slightest movement. Within half an hour of receiving it, I chose to replace it again, hoping to get a fan of the same quality as the first one (without the problematic motor).
3rd purchase (replacement) today 30/08/2024, I received the fan which, while it didn't have the problems of the previous one nor the first, had something new. When it turns left-right, there is a low mechanical sound coming from the motor. On speed settings 3 and 4, you hear nothing due to the sound of the air, but on settings 1 and 2 in a quiet room, you constantly hear the sound, which did not stop even after 10 minutes of use. As long as the fan is not turning, there is no sound. As a result, again, within half an hour of receiving it, I decided to request a refund this time.
With the return, I will consider whether I will proceed with a 4th purchase (which says a lot about the fan and how good it generally is) or, unfortunately, choose some other brand.
In conclusion, if you are lucky (or not unlucky like me), this fan is the best purchase you can make and is worth every last euro. Obviously, for all that has happened, the stores from which I purchased are not to blame in any way, as I received the product boxes in perfect condition.