My girlfriend and I have ordered the cases in black and white.
The matt finish of the black version of the shell is very elegant and I feel that the matte surface prevents slipping of the mobile phone (a little).
The white version looks at first glance a bit funny on the black cell phone, but this is a matter of habit. The material of the white version is velvety matt as the black version, so the white sheath feels a little different to, but also the white version is very high quality and enjoyable.
The white cover is (despite the bright color) not quickly dirty and easy to clean. However, there are small scratches / wear visible at certain points.
Whether the shell in case what good, I can (fortunately) not yet say.