The Case served its purpose for me. My thin se Samsung Ativ S is now a little thicker, but better protected. The side buttons are to achieve even good with a little more finger pressure. Meanwhile, the color of the shell of white-opaque has changed in dirty-yellowish. Yellow for lack of UV stabilization ?? Also, the plastic seems to be gradually losing its flexibility. Since the shell but is a pure function items for me, it does not bother me further.
(I am still not entirely clear what is a thermoplastic polyurethane-silicone? A composite of PU and silicone? Or polymerization of PU and silicone? Perhaps there is a chemist who can enlighten me. Just for interest's sake)