It proves that Morgen isn’t interested in hagiography. He wants to show us the real Kurt Cobain, warts and all.

It’s his home movies with Love and baby — some playful, others drugged and drooling — that fans will find the most emotional viewing. As the credits roll, it’s hard not to just root for the sensitive, progressive, fiercely creative Cobain and wish that he’d lived long enough to find a little peace of mind.

It’s a journey deep into the psyche of the tormented genius, that is as all-encompassing and expressive of Cobain's spirit as a film could possibly be. It's a true achievement, both in documentary filmmaking, and in preserving the memory and legacy of Cobain.

Like a Cobain mixtape brought to feral life, Montage is scruffy, sharp and insightful on an oft-explored subject. The pay-off is terribly moving – it’ll drain you.

What Brett Morgen crafts for his audience - in what may very well come to be known as the definitive documentary on the musician - with Cobain: Montage of Heck (2015) is simply stunning. Morgen runs his coverage of Cobain from the cradle to the grave.