One of the things this game does right is the graphics. Not only do the characters who continue their role from the movie look just like the actors who portrayed them (James McAvoy included), but the visuals on the character models isn't all that makes the game realistic looking, it's the environments as well. The levels are designed to appear large and wide open (thought they are actually very linear), but the amount of detail that went into the design really adds a lot. I was especially impressed during the few levels where we got to go back to scenes from the movie, particularly the Textile Company and Loom of Fate Room.
Audio is pretty solid as well. Cutscenes are filled with pretty solid voice acting, and while McAvoy doesn't reprise his role as Wesley in the voice department, the replacement actor does a pretty good job. One of the little details about the game's audio that is always nice is the lack of excessive one-liners. While your character might spout out a few, they are typically within context and are really only triggered by an event that is happening in-game, so you never really get any stale, uber-repetitive comments while playing.