Quite enjoyable. The Shakespeare tie-in is nicely done: not only with some language, and background of particular plays being performed, but even that the particular plays being performed relate to some degree to the themes of the book; for instance Hamlet (Widge has to decide what really matters to him, and what he really wants to do), and The Merchant of Venice (with some ambiguity about the "villain" of the story).
But parents should be aware that some anti-Semitism is expressed (true to the time) by characters and never really challenged, and it's left rather ambiguous whether the villain of the book himself had some Jewish background. Especially with younger kids, this probably needs some discussion with parents.
An older teen's excessive drinking is criticized.
A "bad" character dies in a sword-fight; it's treated as a serious, sad event, not merely as a righteous "triumph".