FOR WHO? WHY?
Let's say it's a style accessory but also screen protector (if extra on top of that you have a protective film). I dare not advance me in speaking of a shock protection because the valve that does not close and the fineness of the product.
CLOSING THE ABSENCE
Some noted the lack of loving, but products that have in gaining thickness. Alternatively, and to keep the fineness of the product, I would have liked more weight on the valve because it yawns when the case is on the back. A simple metal strip at the end of the valve would suffice to close. Or else, would have required that the wafer is less rigid. Maybe wear over time can solve this problem ...
PRICE
For approx. 15 euros, the price may seem too high hair. A price +/- 10 euros would have been more honest.