A review of this album back in 1974 stated "The Who's outtakes are more interesting than most band's albums" or such. Here's a thing which The Who have in common with Bob Dylan; both have a mountain of unreleased gems sitting in the vaults. At least nowadays Ol' Bob is getting around to releasing his via The Bootleg Series. This collection was compiled by John eEntwistle while The Who were having another hiatus from recording and touring, and while Townshend and Daltrey were heavily involved with Tommy the Movie. Townshend did produce the review of the album for the NME, hilarious in itslef, and used as the liner notes. The original album contained many gems, including almost all of the "Lost 1969 EP", outtakes from "Who's Next", treasures from the abandoned 1972 album, and hard-to-obtain rareities. The expanded edition almost doubles the amount of material, and is even better than the original, even if errors have been made in the notes for lineage etc. You can compile the alternative "Who's Next", burn yourself a copy of that lost EP, marvel at the astounding sound quality of the really early Who, and spend many an evening thinking about what might have been if this lot had only had more focus and single-minded ambition. But that's The Who for you.
trivia; look closely at the names on the helmets. Roger allegedly bought them during the fractious Quadrophenia US Tour of 1973, to show that when they put their heads together it spelled "R-O-C-K"! But some sizes wre wrong, so swapping around had to happen. Townshend tore up the photo to be used for the cover, changed his mind, glued it together and hey-presto! The album was the first to have titles on the cover in braille for blind fans.