Well if we are talking 0.4 I did get it working after a couple of days ( AmiGR must be a bit of a whizz kid ) hard slog on a weekend and quite enjoyed the speedups it gave in places. Its Ok if you don't expect too much. I never got it up and running for long enough ( actually not a crash I just lost interest ) to reach the time limit.
Unless MorphOS 1.4+ gets released for BlizzardPPC or AmigaONE I may never have the opportunity of trying it out.