Faithful to the book in most regards, the film is excellent, and Nicholson's performance is beyond reproach. While the denouement may have had issues (not with the point or the meaning, but rather the delivery), the film is still outstanding.
Nicholson's relationship with the girl (he is beautiful as an aged father) and his inexorable obsession with the murderer are perfect in the film. Sadly, Penn's pacing is inconsistent, as is the sense of "detective" that Duerenmatt was careful to give his novel: the film's heartbeat ranges from driving to rambling, and most thematically appropriate may have been a measured beat which is lacking here.
Nonetheless, the film is gripping, and captures the point, spirit and feel of the novel perfectly. It may not pull off the trick of being both faithful and profitable, but the film is true, and the acting impeccable.
