Good protection but does not last in time

Purchased mid-November IVSO the case for Nexus 7 ed. 2013 was perfect. Thick shell enveloping the tablet perfectly. Rabat articulated solid, thick and magnetized to a good stability when standing and a very good support when it is closed. The thickness of the flap also helps protect the screen well. For cons, the inner velvet gray blackened very quickly to the location of your hands.
Apart from this small detail, I was fully satisfied with my purchase and I would have put 4 stars for this product.

But after two months of use, my opinion changed completely.
The plastic of the rigid shell is of very poor quality. Cracks microphones around the four small magnets thus allowing more recessed keep them in the shell. Each time you open the flap you have these magnets are attached above.
A can of glue and the turn would be played, but the appearance of micro cracks in the top corner of the hull breakage resulted from this one by pieces in court time leaving the unprotected corner of the tablet. My body never underwent shock which may justify the breaking of this one.

Too bad because this was really great for this tablet.

Positive point:
+ Very good tablet protection (at first)

Negative points:
- The inner flap velvet blackened very quickly with the fingers
- - Plastic hull of very poor quality, is cracking over time and removing any utility with a cover