I've long been uncertain about this picture. I can give you 10 intellectual reasons why it should work, yet I don't think it does and I'm not sure why.
IMO, the subject is too close to the center of the frame (brush up on the "Rule of Thirds"). Also, there are objects (table, windows, light fixtures) that don't belong or aren't needed. By cropping them out and moving the subject off-center, it can become a much better composition.