Instruct: Classify an Amazon review as either positive or negative.
Query: A quality recording of powerful concert performances

"Mirrorball [LIVE]", a selection of superior-quality live concert recordings, features strong percussion, piano and guitar backups that allow Sarah McLachlan to vocalize more powerfully than on her studio recordings. The selection includes Sarah's standards ['Building A Mystery' (featuring jazz-guitar solos backing Sarah's extremely strong vocals); 'I Will Remember You'; 'Adia'; 'Possession'; 'Sweet Surrender'; and 'Angel' (with solo piano accompanyment backing Sarah's performance, a powerful but graceful combination)]. The selection and sequencing of songs tells a story: the events leading to a young woman's first relationship with a new partner.I recommend this recording based upon the quality of the recording and of the performances.