I love B&W's. Especially the shrapness and high contrast in this one. I am reticent in critiquing the underexposure of her face, because it may just be a stylistic preference, however, since it seems to be the main subject, it probably would have been best to leave the detail.
Otherwise a very well composed shot! Very clean.
Here's one of mine, still brand new to digital.
Canon 60D+Sigma 17-70
30 sec Exposure