Had mine second-hand and loved it. Got damaged after a few years, and it wasn't until I took the machine apart that I realized just how small the control logic was. The build quality on those machines was nice. I bet I still have the imprints from that joystick lol..the thing could have flown space shuttles, it was so strong. The one thing that got me though was that the games weren't that cheap at the local super store (Amazon then was nothing more than a huge river), so we had to get them second-hand or wait until Christmas. I remember having Pac-man and driving the folks crazy because we were always playing it too loud, same for that game called Berzerk.
The sound was cool at the time but I am not too keen on this mod. Nice that he is keeping the machine going (and it looks like he's an Amiga fan, another awesome piece of kit, one that was waaaay ahead of it's time).