She fits perfectly on the phone, which is probably due to the elastic plastic. The camera and speaker savings are clean and the controls can still operate well with the protective sleeve.
Falls from 40cm height captures the envelope well and there are no visible damages. (Tested with an iPhone 6 Dummy)
The sleeve is also nice and light and does not contribute to fat on. It is really hard to remember, not in your hand, even in your pocket.
On the plus side is that you can not directly open the package after an unpleasant plastic / chemical smell was perceived. The shell smell completely neutral.
All in all, there is nothing wrong with it. Price-performance ratio!