The protective cover is very handy and protects the display through the slightly raised edge even with a fall on the front (except, of course similar in pebbles). All cutouts for camera, charger socket, etc. are more than sufficient. The plastic is initially something highly adhesive, which resulted in my case for self-pressing the volume buttons. This has, however, now given. The only shortcoming of the shell is that the navigation buttons will now be very close to the raised edge of the envelope, which is why they can no longer be pressed with the flat fingers. But you get used to it.
Without envelope I always bit afraid that my right smooth unit sometime slipping out of hand. The shell is a peace of mind when handling.
As a very useful addition PhoneNatic are two screen protectors, which are obviously contrary to many other very easy to install. Clever here is that no holes for navigation buttons, camera, etc. were stamped, but these were formed as recesses on the edge. I think that favors the simple introduction. In combination with the envelope just great ...