I have no idea what libraries you're using and I can hear that it is neither mainsteam nor free, but what you've done is incredible.
I don't think that can be done in a notation program so my guess is a sequencer, but I have no idea how you do that. Simply incredible.
Great piece! The legato sounds excellent. Strangely, the longer held notes sounded more like samples than the fast runs. That's backwards for samples!
The only moment where the illusion of real players broke was the re-entry after the drum solo. First the solo was over too quickly, and second it was like somebody pushed a button to go back to the song. With real players, the entry is a little sloppier, and the energy of the drum solo somehow lingers for a bar or two.
I really love your choice of reverb. You can almost smell the smoke and whiskey!