A total of 16 people speak in this track, and its host Laurent Bouzereau says at the beginning that we are going to hear most general observations with occasional scene-specific comments; that is, this one is another patched-up commentary made from interview audio clips. Even if one overlooks that, the track doesn't stand up by its content; the brief back-and-forth interview excerpts are random, frequently not pertaining to the movie and not very interesting or insightful.
And just a brief correction: Patricia Highsmith (author of the book on which the movie is based) herself is not on this track, but only her biographer, Andrew Wilson.