1- Games run better with frameskip 0 option. Using framskip in Auto there is some flicker in the image. Some games have serious slowdowns when using frameskip 0, so they need frameskip. For instance, Axelay or Rendering Ranger R2 are slow in some moments with frameskip 0, in auto is solved, but they don't feel smooth.
2- Sound is not avery accurate, in Rendering Ranger R2 there are some acute sounds that are not in the original game.
Apart form that, runs pretty good, better than Snes9x4d inho.
Thanks for the update