it looks good.
2 things.
1. the background isnt dark enough.. she needs to be brighter than the background to really pop off.
2. i'd compose it so she's more to the side of the image (not so dead centre.. that allows more "sunset" in.
this composition kindof makes her block out the background as oposed to it blending through. (if you get my drift)
heres one a did a week or so ago.