In terms of processing really have to praise Spigen. All slots are perfectly matched to the device and even the camera lens on the back is well protected. The application and removal is very easy and safe, despite stiffness, leaving no damage to the Galaxy (you can on the cutout for the camera just push out).
Criticisms and star trigger there that air bubbles form when you create the envelope by the nature of the back cover, the one stand out, on closer inspection. Also dust and dirt that penetrates over time between shell and equipment, is in a transparent envelope clearly visible (it is S5 and shell can indeed simply wash off with water).
Biggest gripe is also that durfch lost the envelope, the improved sensitivity of the Galaxy. The non-slip surface is replaced by a sliding cover, allowing the device is poor in hand and like to slip out of your hands if you do not hold tightly enough. Especially on inclined surfaces slides the Galaxy much faster than without covering. I also noticed that the sound sounds a lot more subdued than without covering. Since Spigen has not thought along and failed to incorporate a small increase in speaker on the back.