The exterior design grew on me, for all the issues it had (and at least one major redo), over time. The few times I was in there I liked the ground design well enough as a space. But I'm not sure I've ever heard anyone rave about the interior layout as a working space in general.

I know someone who worked for an HVAC sub for the building and they said it was really hard because there weren't plans as they were used to working on at the time.