1 slots are not bad to fix and i would recommend going for one if you find it cheap but that being said working ones are $50. Mame emulation is amazing and i havent found any issues, there are more issues with the multicarts than there is with emulation as far as i know.
my 161 in 1 works fine.
now you know
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A lot of people that already have emulated neo geo know its spot on most of the time.
I have all three. MVS , AES and Emulated
If the emulation is done with an arcade monitor its nice.. on a flatscreen.. not so much.
the mvs has more problems than the AES. but the aes cost a hell of a lot more.
Having got the 1 slot and a 161 in 1 running tonight and playing it solid for about 2 hours - so glad I bought it - can recommend, although don't be fooled that you are getting 161 games here, there's a lot of variants on the same theme, and a lot of neo titles not featured at all. My advice, check the games list first.
I do hope that one day there will be a different version that captures all the titles, for now, this will keep me busy.