The only thing that's really special is the cantilever, which is kind of odd looking and not even visible on the skyline. It
is quite a feat of engineering though.
The building overall isn't terrible, but some of the designs overseas and in the US blow it out of the water. Even 70's supertalls like Sears or the original WTC are more interesting to me, let alone the ultra futuristic ones of today.
Breaking the height barrier needed to happen though, as the US is major a superpower. I guess you can't have it all, at least not yet. Hopefully we get a taller
and more interesting looking building in the near future.