Your technique is outstanding and the piece is very realistic! I have very few critiques. One, I think it would pop more if you popped the contrast or in other words, darkened your darks more and lighten some of your lights. Also, maybe be a little more gradual in blending the top of the nose from the side of the eyes. I feel like there is just a thick white line going down the center of the nose, gradually blend out so it isn't so sharp. That's pretty much all I have to say great work! You' are extremely talented!