This is a really cool shot. I like how window is framed by the wall on the left and the escalator on the right. Then there's the light coming from the window on the left and the reflected light off the escalator glass on the right creating the V on the floor. And lastly, you have the human element in the silhouettes of the people in the shot. My only "critique" is the "tilt" of the horizontal line at the top of the window frame throws me off a bit, but otherwise I love this image.