stable, protects when closed optimum

disadvantageous if you load the device, because then you can not close it (the charging port is yes bottom of the device) and then the flashing LEDs can disrupt and even protection against scratch and dust is then not given.

During a fall with Cover the top and bottom area is not ensuring (in the unfolded state), My smartphone does unfortunately get nasty scrapes on the edge of the top, because the "shell" in which the device is clamped to the sides completes primary high enough.

Overall still a good thing!