Best Metallica album, definitely. Grief, rage and anger are strongly felt throughout whole album. Never before did James ever sound this angry, bitter and resentful. He easily delivers his harshest, heaviest, and best vocal performance here, without question. Riffs from this album are fucking monumental and most complex and tehnical than it has ever been, just like the solos, Lars peaked here too. An absolute masterpiece of an album. Definitely my favourite of all time, along with Rust In Peace, The Dark Side Of The Moon, and Shogun.