I like it, as rendered -- and I wouldn't have any complaints if it is built as shown.
However one MAJOR question is, will there really be 22'x50' panes of glass, as shown in the rendering? Never mind, I can answer that -- NO. Once the actual 4'x10' panes are put in, with windowframes, and a couple feet of painted metal between floors, the building won't be quite as sleek as the rendering suggests.
cass, any chance of adding that into the rendering? who knows, if done right it might even improve the building.
Second, I'm not sure about the chiselled roof. I'm having trouble imagining it as an actual building -- when first I saw the rendering it looked out of perspective (because I didn't figure out that the building is not a square). Might it look strange from the ground? Perspective can ruin what seems like a perfectly good shape -- as the designer of the Parthenon famously realized.
The chiselled roof might look really good, too. I'm just having trouble picturing it.