I really like this photo! It definitely stands out and gives the viewer a nice and warm feeling! The colours you chose are so nice and add a really nice mood. The light is also amazing - so warm and soft! The model's expression fits also very well and rounds out the image.
Originality: I have seen quite a few pictures with a piano from this view...so it is nothing completely new. still I like the angle a lot and I really love the colours you have used here.
Technique: A blurred foreground is cool but maybe yours is a bit too much blurred. In my eyes it would have lookd better if you could see a few more piano keys. but all in all I am a fan of bokeh^^ It would also be interesting to see the same photo but with another framing. for example in square format with the model's head not cut of.
impact: Like I said before, I really like the image It spreads such a lovely mood. So you did a great job!
I really like the atmosphere and the mood overall and how.. you can easily make a spontaneous picture here, though it'd probably be difficult to capture, still...
The way the colours are applied here is brilliant, anyway. I think there is a wonderful softness to it all, something that is light-hearted, fun.. and yet it also feels a bit.. tired? That may be because of the resting of the head and the overall pose there.
Perhaps you could have moved the camera more to the left and higher up a bit.. but.. yeah, great stuff, anyway!