The reflection is distracting.
While it is distracting, to me it is also a useful piece of the image. Its really hard to say if it would be better without the reflection or not. Sure it may be more clean without it, but it would also be far more generic and uninteresting. The only thing I can think of to make the reflection better is by positioning her or the camera differently in order to make the reflection more subdued or more prominent, but both of those solutions to the reflection problem would change the rest of the image drastically, something that I think would deflate the moody feel that the current image has... It's a really tough call.
Nice job on seeing and using the light!
The background is overly complicated--too many right-angles and hard edges
that don't mix with photography of a woman.
To avoid this I usually shoot down-camera parallel to-the window.
While in many cases this would be a problematic element I think that the background not only gives a good sense of place in this image but that the lines and angles guide the eyes through the image. I don't find it overly complicated or even slightly distracting because it is balanced and well placed.
While hard edges and angles don't mix with beauty shots for females they can be used to create a certain feeling and I think that this image is a good example of that. I wouldn't generalize a compositional element like that as purely masculine or feminine. While they do carry aesthetic traits that relate more easily to different gender's that doesn't mean they should be discounted entirely when dealing with models in either gender. They still work in certain situations.