The shell fits perfectly to your smartphone, niergendst too small or too large / wide. All connections fit so that you can use the headphone port with no problems and the hole for the microphone fits so that no appreciable restriction is perceiving the "take" of the voice. In this envelope, the volume control and the power button are not left out, with my Nexus 4 I have thus indeed have had negative experiences in the last last Nexus 4 case the buttons with a sharp knife cut out of the shell. In this but much thinner shell for the S4 Mini I was therefore initially skeptical but as the shell is very thin indeed, the buttons still convenient to use.
All in all, a beautiful shell that protects the smartphone a little more and it does not unnecessarily thick anyway.