I bought it for POCO F3.
The specific case is of very good quality! It fits perfectly on the phone and the buttons and ports are exactly accessible without obstructing the smooth operation of the device.
It is slightly hard due to its material, so if someone wants to remove it, they may have a little difficulty, but I consider it more important for the device to be protected.
The ring for support may seem a bit loose, but it holds when you open it and the balance of the phone is not lost.
I consider the extra cover it has on the cameras to be a plus.

Very nice feeling in the hand. The door for the cameras is as tight as needed so it doesn't open on its own. Easy to install and the kickstand at the back is quite sturdy. It must have a spring in the mechanism because when you close it, you hear a satisfying "click".