I have the Vic-A Neo Geo AES, but no matching controller, unfortunately.
And right now, the power will intermittently cycle on and off/restart in the middle of playing. Will normally do it for 10 or so times, until it stabilizes.
I really hope it just needs a cap replacement.
I only have 10 games for it, at the moment. I absolutely ADORE fighting games, so I think I'm going to try and buy 1 or 2 games every month for 2020. That's my new years resolution. Topping it off with SNK vs Capcom in December 2020, lol.