Really great model, set and lighting, they create a perfect eerie feeling.
As far as unsolicited criticism goes I got to say that two small things interfere with the otherwise flawless atmosphere for me: the modern plush toy, which doesn't seem to fit into the victorian "American McGee's Alice"-esque setting (on the other hand a typical porcelain doll would have been cliché), and the structure outside the window where just an empty sky would have emphasised the isolation of the room and the girl better.
A photograph is, in its basic form, captured light. This light was obviously created by the photographer and when combined with such great composition as well as a great idea you have a deviation that's stunning. As a photographer I see the picture first and model second. The best way I know to judge a photo is to imagine what it would look like with me as the model, and this would look good even with me in it!