What are the advantages of Heroes V? How do you see them?

Actually, I didn't really use codes much, I've already forgotten. Although, no, I remember the codes: nwczion, nwctrinity, nwcneo. By the way, doesn't it remind you of the movie "The Matrix"? And in general, it's good that there are no codes in Heroes of Might and Magic 5 - that's a plus!!!