Addendum: After only three months in use, first signs of wear become noticeable. The internal coating the slot area may peel off. Otherwise, it holds together well and yet is also not outside greasy.
Nachtrag2: The interior coating dissolves after 6 months of use completely. Have been significant scratches on the smartphone, which originate from the roughened coating.
Have 5 Stars awarded at the beginning, reduced to 4 after three months and give now, as a final evaluation by a lively use, yet only 2 stars. A slightly longer grip life can be for the price but then expected.