Three things: 1) It's tilted to the left too much. 2) Doesn't really fit the challenge, but would be good for a "City Scape" challenge or something similar. 3) I like everything else about this shot. :)
Wonderful cityscape. I think you filled the frame superbly. I particularly like the bottom half because the tones are so nice, but the contrast seems to fade for some reason towards the top of the image... I know dodging and burning in the challenges isn't allowed, so I'm not going to mark you down for that, at least you didn't cheat and try to spot edit. Great composition, really invokes the feeling of city life. And I think the black and white adds a lot to that feel as well. 8
Hmmm ... Not sure how to vote. I think there would have been more impact to a shot that was entirely filled with buildings - though i can appreciate the thinking behind including streets, trees and a famous building.