Retroarch:
SNES is pretty much flawless. Star Ocean, Tales of Phantasia and Super Mario RPG, SMW2 work perfectly. 60 FPS.
FF6 doesn't run properly. While cores can run the speed at a perfect 60fps, the sound modulation doesn't execute properly so the pitch is often wrong.
I used the wonderswan color and played dicing knight (the most difficult WS game to run) and it runs perfectly.
NES Just Breed and Mr Gimmick, the most difficult to run, work 100%. Seems perfect.
Gameboy/color is perfect
GBA -- both GPSP and VBA need work but they're currently sitting at 40-50fps.
PicoDrive -- Genesis/SegaCD work 100%
Yabause -- very slow sega saturn ~5-20fps
PS1 - Untested
MAME/FBA etc -- Untested but I hear good things