Most criticize the unit for poor Bass on transmission, this can be improved by changing C14 100uF to 470uF. I also found the tuning LED seemed to improve in indication by placing a 1N4148 diode across R34 (Anode to 0V and cathode to the cathode of D2).
I also drilled a suitable hole in the top cover for adjusting the antenna tuning as I found it needed re-tweaking with antenna placement.
I added some labels on the rear which should hopefully print to almost right dimensions by loading into MS Paint and setting the print size option to 100%.
The only odd thing I noticed about the design was the fact that they include a stabilised 12V DC supply with the unit yet the internal 3-terminal regulator is also 12V. I have not worked that one out yet