By the time of their farewell, the Band was rock royalty; their onstage confidence, musical chemistry, and unstoppable proficiency—every last one of them is a motherfucker on his instrument—is obvious. But when they invite guests, like Neil Young, Joni Mitchell, Muddy Waters, and even gnomish little Van Morrison, to lead them, the band's true worth becomes known. They are masterful technicians, and in the company of great artists, they recede masterfully to a supporting role, playing even more confidently than before. Martin Scorsese shrewdly catches the players' tiny interactions onstage to highlight the confidence.