A deeply flawed film. As others have remarked, too heavy on Warhol's sexuality and too much gushing critical praise bordering on worship. Just not enough interesting material for 4 hours of documentary.
Now, here's the most annoying aspect of this documentary: Ric Burnes' ghastly use of his brother's technique - the'Ken Burnes Effect'(KBE). For anyone unfamiliar, this means the relentless zooming and panning across old photos, and in this case, artworks. I presume this gives the film makers added material (and movement) as they can zoom in and focus on different parts of a single image getting double or triple duty from limited resources. Completely unnecessary for an artist as prolific as Warhol - in fact, there were very few works shown full-frame in their entirety.
The use of KBE in this documentary is just plain aggravating. Imagine roaming through an art gallery looking at everything as if through a keyhole! Works of art are obviously meant to be seen whole - not in bits and pieces. Here, nearly all of Warhol's painted/screened works are presented zoomed and panned - an abomination, and a wasted opportunity to present these works to the public as they should be viewed. What a shame.