Using the Rolling Stones Mobile Studio, they held recording sessions in the basement. They completed the new tracks, along with material dating as far back as 1969, at Sunset Studios in Los Angeles. The resulting double album, "Exile on Main St.", was released in May 1972, and reached number one in both the UK and the US. Given an A+ grade by critic Robert Christgau and disparaged by Lester Bangs—who reversed his opinion within months—"Exile" is now accepted as one of the Stones' best albums. The films "Cocksucker Blues" (never officially released) and "" (released in 1974) document the subsequent highly publicised 1972 North American Tour.