A. Does it work
B. Does it work... properly
C. What damage does it have.
I'm not sure what else to tell you. The fact you brought up "Namco vs Midway" makes me wonder how anal you want to be about purely original parts and art. Personally, I'm running a bootleg board in an original cab, with one side-art being repro (that doesnt say Midway). Do I care? No. It looks very close to original and plays like the original.
I'd worry more about the monitor and circuit board being stable. Look inside at the wiring too; See if there's a hack-job in there.
The machine you linked to looks good IMO. Kickplate art isnt worn. Just needs a control panel overlay.