Optical: piano lacquer. There is nothing more to say. Even if one or not. Mir gefällts, matches the TV and when I need anyway to dust, I can make the player with the same clean. The player is pleasantly small and the design with the rounded corner is something different.
The basic functions BluRay and DVD playback function properly. Although the player makes short a little noise when reading, but after that is not annoying drive noise more audible.
For USB playback: the only drawback is that the player fails to mkv files. Worth it for me to bear and no penalty. Otherwise, everything was perfect. Pleasant is the possibility eg to control the Youtube app via smartphone. Foolproof set up in seconds and very comfortable. However, it is then already recommended to use the phone in the WLAN.
All in all you can not go wrong for the price. Buyer please remember: As usual nowadays unfortunately no HDMI cable included.