For the .emu apps from Robert Broglia I'd say that they are defin. worth the buck as there is a big difference compared to many other emulators available for free. Most of them are based on freely available sources from emulators for x86 platforms, but I guess that it consumes a lot of time and dedicated work to port and finetune them for the android system. SNES9X EX from the same developer is free (I guess for copyright/IP reasons).I like the fact that they all perform well and have a standardized user interface and think it's good to support a developer that invests into the further improvement of the apps. Another good example would be FPse - The Playstation Emulator.Differences between paid and free emulator are sometimes minor, but this is the whole idea of the thread. To discuss and recommend each others favorites. This would allow a lot of users to gather all the information they need in one spot before trying a lot of emulators wasting precious play-time