We did this when I was in high school. Our marimba ensemble played this. I was on one marimba the other three players were also on marimbas. One xylophone player played the fast parts.
The performance is well done and it seems to be written well, but I do have to say the mixing is a bit in poor taste. There are plenty of times where the Marimba is overpowering the Xylophone too much.
