Found and bought first partly filled with all sorts of updates, yet the type keyboard was not recognized. I thought: Just wait, maybe there's an update soon. A few days later further updates were available, including a new firmware. After installation, the keyboard was finally realized. The battery life was initially quite mau, prolonged over time significantly, reached subjectively but still not 100% (?).
I used almost all done on the PC, now only advanced image manipulation and a few other applications.
The problems discussed here, I did not at the time. Perfect? No! But succeeded. Absolute buy recommendation.