For handling: Many complain about the purity and take out the iPhone. A small plastic or wooden stick between Protector and iPhone when changing plugged, does this in seconds. Traces of leather or plastic wrap on iPhone I could not recognize.
Mobile phone usage in the case is given to the full extent. The touch screen surface reacts sensiebel like without shell. The upper section (1 cm) is necessary to press on a bit more, because at this point the film is pulled back to the leather stitching. Can be technically and otherwise not at all solve!
Malfunction during a call, because the proximity sensor is covered by the sheath, I could not even notice. Also, the display goes out while phoning - as even without shell.
All other functions such as USB or headphone port, buttons, microphones and camera, can be run without problems. Only when you have to shoot the door with the thumbs up to see the display. But a car can not turn in the garage ;-)
The 3 card slots in the case flap, I had concerns relating to the magnetic closure. But here everything is thought because the magnet is arranged on the back of the case. The trick is, when you hit the door toward the back and the closure reconnects with the magnet, the iPhone is as if floating on the desk and also can be also good use and make calls.
The belt clip I can not comment because I this disuse. But visually and by using her he makes a solid impression.
All in all a very good product, which justified its price.
A deduction of points I would give, because the case is more appropriate for the Model 2G than 3G! Through the narrow edge of the 3G series, the seam is bulged outward and the rest of the case-wall is hollow. But I have a 2G ;-))