Although the student plays well, he could do better. Ivry Gitlis mentions several well-known violinists as an example.
Regarding the Introduction of the work, Gitlis advises to play the first note as pizzicato, since this piece should sound as if someone was walking. It must also be performed in tempo, but not metronomic: it can be done rubato. He later on gives some suggestions on bowings and bow distribution, sound, or metrics, inserting some musical anecdotes.