I worked in the Galleria for almost a year and a half. The building is fine, though it definitely looks like the 80s and 90s happened all over this place. The foyer and subsequent acoustic principles make me want to do an a cappella concert in there (yeah, I said it...nerd alert). It seems like they do maintenance work on the escalators on a weekly basis, which can be annoying.
The maintenance staff there is great, and you can take yourself on a fun adventure trying to find the "executive" restrooms on the third floor. Overall it's a nice building, though you have no reason to go unless you work there.