Very good and quality. But when I open it and turn it over to the back of the tablet, something affects the magnets and the screen turns off. In upright position, however, it is just fine.

3 stars because when the cover goes to the back of the tablet, the magnets it has affect the stylus, resulting in it not working. For the same reason, it locks itself randomly. The solution to prevent this phenomenon is for one of the 3 folding sheets to fold one more time, meaning the back side is covered by 2 sheets.