This is a really great capture, the shape and light combination is really effective, I like it a lot. This is the best picture in the challenge in my opinion and I'm adding it to my favorites, good job.
Nice capture. Fits the challenge and has some interesting aspects. I like the drama of the architecture and the action of the photo with the people walking around.
The tone is nice, but I find the extreme darks and the blown out lights from the windows to be a bit too overpowering. Details appear to be lost in the image because of this and I think those details would help make the image even better.
A little more light in the image would add to the idea of watching people as you'd be able to see a few more details of the people being shown. Overall its a great idea and the composition is nice, it just needs a little more light. I gave a 5.
i like the effect of the light through the windows on the right side of the picture (and a train station is a great place to get 'time passing' pictures) but it's still too dark and the person in the center of the photos detracts rather than adds to the overall shot.