Oz can help advanced learners become more confident with fast and natural English. Following the story requires attention, so language difficulty is not the only challenge here. The vocabulary is not overly technical, though it includes enough variety to make the practice meaningful. Also, crime scenes may bring in words related to investigations, police or legal vocabulary. At an average of around 94 words per minute, the dialogue is generally manageable, though some exchanges require more attention. Oz works best for learners around B2/C1 who are ready for a more complex story.
