The conductors featured in this set sport impressive Mahler credentials. Sir Simon Rattle, Bernard Haitink and the late Claudio Abbado have each recorded the full cycle of the symphonies, and between them, 15 additional Mahler recordings with the Berlin Philharmonic alone. Each of the others has established himself as an exponent of Mahler, and several have impressive Mahler discographies. That said, it is impossible to be objective about music that communicates on such a personal level. Suffice it to say that I found many of these performances to be outstanding, and none was less than impressive on a technical level. Two have historic implications: Abbado's performance of the adagio from No. 10 is now not only a memento of the centennial of Mahler's death, but of the conductor as well; Haitink's No. 9 may feature somewhat slow tempos, but the valedictory last movement is incredibly affecting. As usual, the sound production is first-rate: while the surround sound is not of the immersive variety, the engineering is never less than precise and detailed. The sumptuous package features excellent program notes, and includes a bonus video of excerpts from interviews with the conductors discussing the symphony they have recorded.