Not so shabby! :) It's not as strong as it could be. When the piano came in, it sounded very weak. It's FL Keys, right? Try to lower the velocity of the piano, too. It sounded loud which gives it the "slamming keys" effect, and since the song is a bit soft. You don't want that. Towards 3:45 it sounded really cool. It has a good beat 'n' stuff.
Work on powering VSTs. I suggest lowering, or adding bass notes to FL Keys. Then, it'd sound more full. But it sounded very empty, and for pianos even though you don't want a lot of bass frequency, you'd still want to hear the fullness and that's achieved by bass notes.
Overall, I'll give you a 4, but 5 you on this so that others may find it and give their opinion.
Thank you very much!