Hmmm, no kidding. Well, I must admit that this is quite impressive for a programmed midi performance. Some tempo automations to emulate rubato, and that would be pretty amazing. There are some reasonable piano sample libraries about these days too, so for none pianists, this is a great option when producing music.
I wonder what the 'expressivo' function actually does? Maybe it randomly fluctuates the timing and dynamics, not sure. Will have to look into that one.