This game is a fantastic addition to an already great series. However, it is best to play the previous two games (Phoenix Wright: Ace Attorney, and Phoenix Wright: Ace Attorney: Justice For All) for full understanding, because this game contains many references in terms of characters and plotlines.
To play and enjoy this game, one must be a proficient reader and also enjoy reading for pleasure, as this game involves hefty amounts of text during court scenes.
The series overall has great messages of justice and truth, and the protagonist reflects these. However, I would say that whilst previou games were suitable for most mature 11 year olds and up this game is suitable definitely for 13 year olds due to it being slightly darker in content.