I have to admit, I played with PC-Task and PCx demo versions, but to be honest, never actually used them for anything as they were just far too slow on my machine.
It's a pity a PPC version wasn't made. I imagine being able to prod the MMU into marking a wedge of RAM as little endian - or at least using the load/store byteswapped instructions, bigger caches and ample register space would have allowed for a quite usable PC emulation back in the day.