Very useful in finding/figuring out some of the more obscure riddles and trophies, but clearly wasnt giving a proper quality check before release. A number of descriptions dont match the corresponding images, some locations are switched with others on the opposite side of the same map (i.e. Museum riddles), some descriptions are given opposite directions (i.e. "go west" instead of "go east") and lastly, not all the riddles are included (a number are missing from the Steel Mill map). Still, as companion guide its pretty good - just dont plan on using this as the definitive guide and youll be pretty satisfied.
vinniepop about Batman Arkham City Official Map App, v1