Instruct: Classify Amazon reviews into positive or negative sentiment
Query: a vocally stunning Isolde

The excitement of a live performance contributes to the enjoyment of a performance. I have never heard Birgit Nilsson sing with such involvement or technical prowess. The Tristan is only adequate but the rest of the cast is excellent. The conducting of Karl Bohm is involved and technically powerful. I never particularly enjoyed this complete opera but this recording has made me change my mind. Excellent in almost all aspects.