I currently use 3.71 M33-3 on a PSP Slim model and so far:
Sega Emulation is for the most part good
GameBoy, Gameboy Color and GBA seems to work great except for some minor compad issues on GBA
However I can never seem to get the SNES emulators to run perfectly!
There is almost always some sound hicks or a game wont run at the speed it is suppose to (Lately mostly too fast)
Now is this a problem with the SNES Slim version?