I don't know why people would want to replace the native emulators for CPS1/2/NeoGeo--they actually work pretty well.
Anyway, I've had a chance to play around with it and I'm really impressed. Aside from the Simpsons, the only games I've found that don't work are "Aliens" and "Sunset Riders" from Konami. "Thunder Cross II" (also Konami) will start, but freezes about 10 seconds in and requires a hard reset of the Dingoo itself. Weirdly enough, the attract mode will also cause it to freeze in about the same time. "Devil World" runs, but very slowly.
Hopefully, you'll have support for Bubble Bobble in the next version; It's one of my all time favorite arcade games. Thanks and good luck!