Solid!
I've listened to this LP twice now; once by myself and another time with a friend. For a bootleg recording of a live show, the audio is very lively and atmospheric. There are two points on side B, on my copy, where the audio in the left channel dips for a second, but honestly, it's nothing too disruptive. As for the performance itself, it's spirited & hilarious. Ian Mackaye keeps yelling at audience members to get off the stage between songs and gives one of the most energetic and harsh renditions of "12xU" as a weapon to curb the disorder. Although it seems each tune is followed by one of these outbursts and by the end it's kind of bothersome. It consistently destroys any momentum the power of these songs can carry. Discogs won't let you do partial stars so I gave it a three. In reality, it's more like a 3.7. If you're a huge fan of Minor Threat, it's a novelty that is a really cool piece of their history to have. If you're just getting into the group, just buy the "Complete Discography" record from the official Dischord label.