For product: The charging function is extremely practical. The visual and tactile impression exceeds my expectations, very nice. The slippage when writing system to correct sticking the supplied feet. The keyboard design is not optimal, so for example you have to have pressed for function keys Fn. Thus, from Alt-F4 -> Alt + Fn + F4, quite a finger sprain; ) However, to write the keyboard is perfect. There are slight latency issues (about 10-30ms, makes itself noticeable while playing) when the computer is farther than 1.5m from the keyboard. Whether this is a specific phenomenon of the BT connection, I do not know, but probably. Normal users will probably not interested.
Conclusion: For the price is a worthwhile investment. I am happy.