Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointing release

This album is most disappointing. Heppner and Eaglen, touted as the best Tristan and Isolde of their generation, aren't really up to the demands of their parts. Their singing is unimaginative and musically bland. Yes, they hit all the notes (with a bit of strain here and there) but that's not enough for the opera. The Met orchestra gives a good performance.