Very good, as always. :)
Good work on dynamics and working in the upper register of the piano- a really gentle part, much the same as on Harp. Reverb is good.
As an orchestral nut, I gotta take of 0.5 for not arranging this for full orchestra- it's too beautiful to be cherished by one instrument alone. :P
Keep compos(ed/ing)!
-Samulis