Super Deluxe five disc (four CDs + DVD) Edition features not only the original remastered album and accompanying studio and live B-sides, but the first full official release of the pre-Nevermind demos recorded at producer Butch Vig's Smart Studios, as well as boombox recordings of subsequent rehearsals through which the listener can actually experience "Smells Like Teen Spirit," "Come As You Are," "On A Plain" and others that take shape before his or her very ears. The Super Deluxe also offers an altogether new perspective on the finished Nevermind album exclusive to this format in the form of the Devonshire Mixes: the album as produced and mixed by Vig as opposed to the commercially released final version produced by Vig and mixed by Andy Wallace. Rounding out the Super Deluxe are a pair of previously unreleased BBC recordings and the aforementioned 1991 Paramount show available for the first time and exclusive to this format on CD and DVD (which also features all four music videos from Nevermind), as well as a stunning 90-page bound book full of rarely and never- before-seen photos, documents and various other visual artifacts of the Nevermind era