I had hoped for a fantasy adventure here, but it wasn't what I got. Perhaps the title and trailers are misleading, but doesn't make this a bad movie.
The cinematography and casting/acting are first class, cannot really fault it. I was hoping for something similar to Labyrinth, but instead got a story of a troubled young girl, flickering between reality and fantasy, all as she dealt with the issues in her life.
I can relate to portions of this movie very well, so it certainly tugged on a few heartstrings with me.
I would recommend watching this, however it has now made me think I need to watch something like this, but better. A Monster Calls perhaps?