Good use of HDR to get detail in the windons, facade and some of the sky, however, the colours are a tad flat and there's not enough pull to any point of interest in the image, so one's eyes just wander the image.
There are aspects of this I really like, such as the clean outlines of the building, and the boldly lit windows. Very smooth overall. The composition and slight curvature are not sitting well with me though.
looks like it needs more contrast. Seems very "cloudy". I do like the concept for HDR and I think if you had gotten more of the building and less or even no sky it would be very cool.