The delivered envelope is easily applied and fits like a glove. All Connections and controls (except the slots for the SIM card and the SD card) are freely accessible through the lateral recesses. I could not feel the effect of a restriction of the camera field of view through the shell or its lens cutout.
The shell is very handy and also provides some impact protection for the corners and edges when a Sony should fall times. From too great mobility of the envelope or even a risk that it falls out of the envelope, as some reviews have claimed, I could not see anything. Also of discoloration or yellowing of smoky-transparent envelope I have not noticed anything yet after six months.
All in all I would even now, half a year after the purchase, still satisfied with the shell 100%, if not, would annoy more and more me over time a few "design flaw" that tarnish the joy of the envelope yet (not to be misunderstood: I can see the shell still good conscience, because of the other advantages that it still has, but "punishment must be"):
First, the still verschmerzbare fact that the shell has a fairly thick wall thickness and quite disappear the buttons for power on / off, volume control and the camera releases in the sidewall. Just be aware every day that you plan also expresses correctly determine if, for example, a photo shoot. Also you can more easily "make a mistake"; how often I have, rather than adjust the volume, the phone switched off accidentally ...
Annoyingly: Due to the thickness of the shell and the rather narrow gaps does not fit a magnetic connector for charging cable, as it gives him to buy as an accessory, to the charging socket. The plug is indeed due to the magnetic charging port "hanging", but it does not constitute a current contact. And I had bought myself the magnetic charging cable for the reason not to open the folding sleeve for the USB charging cable. Fortunately at least fits the Micro USB connector of the conventional charging cable still good "with" the shell, so you will not have to deduct to load the phone at least conventional.
Conclusion: A practical case with small design flaws that interfere but more or less, depending on how you use the phone. Currently, the Xperia battery makes limp noticeably faster (an absurdity at 6 months), which is why I need to charge the phone more often. Flap, plug ran, or even shell down, magnetic charging plug ran ...