I got mine too and I completely agree, nice casual gaming board. Swapping games is so easy that it makes it nice for a good fighting session which this thing excels at specially CPS2 fighters, they play extremely well. Here's a breakdown of what I tested so far.
CPS2 runs the best, fighters play smooth, scrolling games get some tearing but depends how fast it scrolls, slow games see very little tearing, pixel count and uniformity is on point, best looking system on the board.
CPS1 runs second best, pretty smooth, lots of tearing on scrolling games which the CPS1 has tons of but even so the gameplay remains smooth and the pixel count is just as nice as CPS2.
CPS3 looks great, skips frames constantly, perhaps even at a fixed rate, playable but don't look to have a solid fight with this.
Neo runs smooth, looks odd with lots of scrolling issues as the pixel count is not even, very playable though.
Konami games, very playable, pixel count is odd.
Psikyo games, lots of tearing and scrolling issues and it plays somewhat ok, some games run smoother than others. 2 players 'causes frameskip bullets, single player not so bad. Gunbarich and TGM2+ play rough.
Cave games run ok, lots of scrolling, keep in mind this are playing in yoko, for what it is I can live with it but look elsewhere for the authenthic feel, otherwise not bad for a cab that can't tate or something.
Toaplan same deal as cave.
Raiden doesn't play well, audio is horrible.
Some single games I played that felt pretty good.
Puzzle de Bowling
Slapshot
Guardians
Sailor Moon
Keep in mind that scrolling is always going to be an issue but it's less with some games than others. Excellent setup for testing out games you'd like to get into, the number of games aside from the bootlegs is pretty staggering still. For the money (including the jamma adapter) this thing is well worth money. I'm very happy with it and it's perfect for lazy days when you don't feel like swapping games. Way less work than a MAME rig for the Capcom lovers. Neo lovers, better of with the 161 in 1 but this is still pretty cool if you don't mind the graphic shortcomings. Sometimes you really forget about it after a while and after lots of drinks...
Edit Note: Played on a New Astro City Sanwa MS9 monitor.