Functionality:
The case has a very pleasant feel in my opinion. Despite good grip it easily into your pocket bear without a mountain fluff to draw upon removal per se. All openings are there where they belong and also the size fits. Even the power button can be relatively easy to operate, in order for example. To activate the power saving mode. The recess on the camera is optimal for my Geschack. You can easily wipe the fingertip and a cloth over the lens.
Aesthetics:
My N8-00 (orange) shows almost no to the Case. Its elegant curves are well recognizable. Even the pattern of the case on the back, I personally find not annoying - but that's a matter of taste.
Shelf life:
My C5-00 is now embedded already 1 year in the the case. Have also taken out from time to time and used again. So far, the Silicon Case is still as soft as at the beginning and it has no cracks.
Would not, no matter which mobile phone / smartphone, always buy at the availability mumbi Silicon Case for.