Rowleybob's entry had plenty of detail everywhere, which had both positive and negative effects. When you start the map, for example, you could already see things like the bomb, the crates filled with objects, and of course the damage to the concrete structure, with its metallic reenforcements and some pieces falling apart with func_rotating? entities.
The idea of making water from the pipe flood the area was quite good and daring.
I would have to complain about the retexturing of the light fixtures, but it was probably due to the lights.rad file.
The inaccessible room was a great addition and made the map feel bigger, as well as providing a chance to add more detail which otherwise wouldn't fit in other parts of the map.
The flooded are was ok (not my favourite water texture :P) and things like the green bench cushions floating among the rest of the objects was really nice.
About the retexturing of the map, I didn't consider it a primary objective for this competition, so anyone who left the textures as they were wasn't penalized by my pov.
About the funny things I had thought while checking out the entries: One of my main interests was to see what each of the participants believed was beyond the boundaries of the map. Besides the windowed gallery, the rest was very open to interpretation. For example, most people thought of it as bunker-like structure right beneath the surface, when there could have been more levels above or below it (some of you showed it with the elevator). There were some doors that I never saw open in any of the entries, like the hangar door with the "Waste processing" sign on top. What lies beyond will stay unknown...
Once again, congrats to everyone