Thanks all for the kind comments!
Sandro - that's exactly what I liked about it as well - the geometry and color contrasts.
Slobodan - I would have liked that as well, but unfortunately the construction of the building was such that the really strong oranges would have fallen below the line of the glass part of the building.
Bob - good suggestions. I've though about other crops and compositions as well, including square and I did also shoot a little ICM along with the regular shots (attached).
Mjollnir, Thierry and Mark - I really appreciate the kind words. I definitely plan on trying this one out on paper.