I've been trying the latest version and here's my results. Old arcade games (Donkey Kong, Pacman, Q*Bert, Frogger) run great. CPS2 game (Alien vs Predator) ran ok with occasional slowdown. Surprisingly every NeoGeo game I tried had badly garbled graphics and was unplayable. Any Konami arcade game (TMNT, Simpsons) had the same problem. The few other engines I've tried so far wouldn't boot any games. BTW can you use FBA cheat files with pfba?