Phew ! That looks really interesting, but I think that they could really do with some thought on designing their website and what messages they are trying to put across to people who are completely new to their software. I found it very difficult to understand who would want to use the software, why and what its benefits might be.
The screen shots look quite impressive, but the two video clips I found linked were not a good example of the software's capability as the human-played vibraphone part drowned out the software backing. Nice playing, but so what ?
Maybe I'm being dumb today.
Rhys