The kit came with a dinky 8" display, so I upgraded to a larger 12.1" display.
I swapped out the crappy included Zippyy joystick and Abundant buttons for a Sanwa JLF and OBSF-30's.
In order to get all buttons functioning properly in Recalbox, I flashed the Picade kit board with modded firmware I found on the Pimoroni forums. Now it works perfectly!
Check it out: