This bit made me lose some coffee out my nose.
I have tested with a few games and it seems to work quite well, though obviously *performance isn't as good* as it is on a real XBOX.
I can see it now: Halo on Amiga @ 0.00001FPS with all effects off.
I also like the bit about having to have a real Xbox to make it work, point of... and defeats the... are two things that spring to mind.