Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lots of Dubal, little of Horowitz

Dubal's narcissistic, self-absorbed account of his relationship with Horowitz is nauseating. Dubal's "firing" of Horowitz for not treating him as an equal is fascinating - Dubal, a relatively deservedly unknown musician, can't deal with Horowitz' deserved fame. Dubal's jealousy is sad, very sad.