'Brian Wilson: Long Promised Road' Film Review: Frustrating, but the Music Is Transcendent

The good thing about "Brian Wilson: Long Promised Road," a documentary that premiered on Tuesday at the Tribeca Film Festival, is that it effectively makes the case for the startling musical genius of Brian Wilson, using celebrity testimony and musical examples to paint a clear portrait of the troubled songwriter, producer and singer as a protean pop creator. And the frustrating thing about "Long Promised Road" is that it makes that case and then keeps making it for an hour and a half, to the po...