I ordered the M5 and instead they sent me the M6 which doesn't work. It shows that it's connected to the charger but the screen turns off after 2 seconds and the menu never opens. Also, the purchase receipt was not included in the packaging.

It was purchased as a gift for my daughter. Initially, I can say that the strap is not pink as it claims, but rather something towards purple, somewhat colorless. The synchronization with my daughter's tablet was easy, and that is the only positive thing it has. The measurements have no relation to reality, not that it matters since my daughter is not involved in sports yet, but the main disadvantage is that it doesn't last 2 days without a second charge and it was not continuously synchronized with the tablet via Bluetooth, only for a moment at the beginning. If there was an economical Xiaomi in pink color, I would not buy it at all!!!

It never worked, I had to take it to a specialist in order to be able to charge it. After returning it and receiving a new one, it still didn't charge at all.

It is the definition of a terrible product! Truly a waste of money...
The screen is not touch-sensitive, it has a button that controls all the settings, inconvenient in my opinion.
However, the battery charging method is truly awful!! The magnet is really weak and does not make contact! It takes half an hour to connect it yourself with a tiny cable, just 5 centimeters long, so you can understand that the charger, which is not included in the package, with a weak magnet that cannot be stabilized anywhere, constantly disconnects...
If you survive nervous shaking and three brain strokes every time you charge it, then you will have a nice little fitness gadget that you will wear to justify that you made a terrible purchase and settle for it... until you throw it away at some point within a month!

My own worked only for half an hour in total. It suddenly turned off and never worked again. Money wasted.

Well, the screen is not touch. There is a button that does all the work. The magnet for charging is simply awful... It is definitely placed upside down, resulting in the charging cable and device repelling each other. At least tragic!!! To have a watch that looks like a good smartband is fine. But that's about it!!!

I have had it for two weeks now... its measurements are relatively accurate... yesterday I went to charge it (while it had half battery) and now I don't have a watch anymore... its screen turned black and it doesn't turn on at all...

Continuously lost contact with the bt.
Within 2 days, the screen froze and was unresponsive!
The only good thing was the magnetic charging.
In the end, I broke it out of frustration.