A friend worked there for years, she said different offices would either be far too hot or else freezing on the same day. There was never a comfortable room.
If the interior offices were kept clean and tidy, I can see how it could be kind of interesting in a retro-futuristic way. But given that these are government offices, they're often full of stacked cardboard boxes of files and other mess that ruins the look. At least the building doesn't have drop ceilings (at least as far as I recall.)