Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Perhaps the Greatest Opera Ever

This is a magnificent, moving, authentic performance of what is arguably the greatest opera ever written. It is music drama as Wagner could only wish making. And I love Wagner. Also, it doesn't hurt that two leading women are stunning. If the prologue with the not-so-goodlooking naked male makes you uncomfortable just go to menu and skip it. This performance is essential for any lover of opera. Buy it and you will watch it again and again. Mr. Gregson says it very well.