I don't know why it took so long to get a proper* live album from Nirvana, but Live At Reading is great. Of course everyone knew that for years. It's one of the most bootlegged shows of the band. But the setlist is great - w/ shit from all the albums and even some rarities; the clarity is great and they crammed as much as they could on a single disc. Bootleg collectors may well wish to just stick to the version they've had forever. But I'm super happy w/ the above ground release of this one.
*meaning Unplugged is acoustic, and Muddy Banks is a compilation.