This is an excellent high key shot. I'd suggest a little more work with the eyes (catchlight is taking up the bottom 1/2) so they stand out a little more.
Very interesting perspective. I am immediately drawn to his eyes. Not sure I like the burned out parts of his forehead and midface although that is probably intentional on your part.
I like the composition and how the head is angled which causes the eyes to be angled. I liked the blurred background. I am not to keen on the middle of the face being blown out. That just seems to take away from the photo.
I'd have pushed the high key even more, but try and save the eyes. Somehow this seems a little unbalanced with the lighting effort. The upper left appears as a nicely toned B/W photo, yet the bottom 2/3's of the face is blownout. Compositionally what you've included in the frame works well. One last thought, I think the eyes should be clearer. There's too much of the white reflector showing and is distracting.
All of the above is JMO of course. :D Good luck in the challenge.