+ The color (dark blue) of the shell color fits perfectly with the Galaxy S4 in the color black. Although black is specified, the Galaxy S4's not completely black but rather has a very dark blue color. For the white Galaxy S4 I would not recommend this envelope. But that's a matter of taste.
+ All recesses such as the camera or the microphone are perfectly positioned, nothing is hidden. Even the speaker survey is taken into account with this envelope. In addition, the camera is now better protected, since it is now in a kind of trough through the shell. Also sensors and front camera are not covered.
+ The device is naturally through the shell slightly wider and heavier minimal. But this is quite positive because the device is thereby grip and better in the hand. From the feel of her my sleeve like it very much. The sleeve fits comfortably in your hand. By rounding the shell on the back, the phone does not work quite as huge as for example when SPIGEN SGP NEO HYBRID. This material is quite resistant to greasy fingers and the like. This is very practical for everyday use.
+ It forms a small lip on the front page. This protects the display in case of an emergency. In addition, you can thus place the phone on the side of the display, without fear, to endanger the display thereby.
+ The included soft button stickers for the Home key fit exactly to the Home button and make the operation more enjoyable.
0 The keys of the envelope are not perfectly managed. While we now have to push relatively strongly in order to press the Volume button can it hardly needs power by the power button to press. At first I was worried that the key is thus operated in my pocket often. This concern has proved unfounded. That's why I see the whole thing as a neutral, and not as a negative point.
- I actually exposing only one thing on the sleeve, namely that the envelope is minimal on the small side. The lip is formed at the front is really narrow. They may be big enough to protect the phone but it bothers me that a very thin part of the frieze of the Galaxy S4 can be seen in one place, namely in the lower left corner.
All in all, criticism on a high level, the envelope is really succeeded. :)