Music critic Greil Marcus remarked, "John's singing in the last verse of 'God' may be the finest in all of rock." In a retrospective review for "Rolling Stone", Robert Christgau wrote that the album's lyrics are political, existential, and carefully thought out, while Spector's production is elegantly simple so that each instrument resonates. Christgau added: "Left out in the open, without protective harmonies or racket, Lennon's singing takes on an expressive specificity that anyone in search of the century's great vocal performances would be foolish to overlook." Garry Mulholland of "Uncut" describes it as a "masterpiece" that "remains the most profound and perfectly realised confessional album that rock'n'roll has produced". In 2008, it was the subject of a documentary film by Matthew Longfellow as part of Eagle Rock's "Classic Albums" series. Coinciding with the 50th anniversary of Lennon and Ono's twin 1970 albums, Thames & Hudson published the book "John & Yoko/Plastic Ono Band", which includes illustrations by Voormann.