The device is easy (if the child is of reading powerful). Only the font size of the guide has given me a little trouble, but so is in a good household Also a magnifying glass. ;-)
The described in another recession facility problems I can not understand. Anyway, you can put the blame for this, neither the manual nor the equipment.
The coupling has worked for me only when staked power cord. After power cord plugged in for charging back, built Bluetooth connection and the music was there. Oh yes, you can only connect to time with the device, but who also has a mix of music from 2 devices simultaneously listens to ...
Too thin sound at higher volumes I could not tell. This may be because it was not previously used cable quality. Anyway, I do not hear a difference to the cable connection. Because nowadays anyway hear almost only mp3's, where naturally certain frequency ranges missing, I doubt that you would hear a difference with a better cable.
The coverage is for me in my 60 square meter apartment (unit is relatively centrally positioned) perfectly adequate. Rarely (!) Times, a very short dropouts. With no outs you get it anyway just go when you turn off the wireless network. Anyway, I have not found it disturbing.
I would buy the device at any time and speak from a strong buy recommendation!