Reviewing It's About That Time: Live at the Fillmore East (March 1970), is kind of pointless. If it had been released at the time it was recorded, in an artistic bubble, it would stand on its own as a ground-breaking, genre-shattering classic. But it wasn't. It's part of a sprawling oeuvre and is merely supplementary material for the devoted. Good or bad, it's more Miles Davis from the height of his electric period and if you're going to want it, you're going to want it.