Unreliable audio playback and extended charge time

Unfortunately, I am very unhappy with the device. Given the high price I had imagined something more. In particular, the audio function is not satisfactory (at least for me). Very often, no connection is established or after removal from the dock, the audio output of the tablet does not work, so that the tray must be inserted into the dock again. Often the audio output of the tablet works only after repeated insertion and removal again. This is very disturbing. Moreover tripled the charging time when geldaen on the dock - gwmessen mind you the same power supply. Overall, I am - very disappointed - in view of the relatively high price.