Is that your violin? Looks like a pro set up to me.
As far as composition goes, the convergence of the neck/strings with the center staff creates a little unpleasant disturbance. I would've liked to rotate the violin in such manner that the convergence happens outside the picture. It feels a little crowded, IMHO. I am not sure what the white-ish striations on the music sheet are. They seem to be very much like the spruce grains of the top of the violin.
You play violin?