I think its gone off. Remember reading that Vol de Nuit is famous for turning rather quickly, was it Dr.Turin who wrote it? Well whoever it was said this makes finding VdN in vintage difficult.
Which version have you bought? The parfum is woody and does not have big sillage(I have the dab so not sure about spray). The edt is powdery and again not big on sillage compared to other Guerlains.