This is among the worst movies I have ever seen.
It's one the most pretentious, in-love-with-itself, disjointed, poorly shot and poorly edited piles of garbage I have ever actually sat through in it's entirety. This does a great disservice to fans of Nirvana in any capacity, and any moviegoer who thought "Hey, 'from the Director of Good Will Hunting' how bad can this be?"
The answer is shockingly, frightfully terrible.
To give you an idea, the majority of the dialogue in the ENTIRE FILM comes by way of an unscripted visit from a guy selling ads in the phone book. The most captivating performance in the movie comes from this non-actor who accidentally stumbled upon this house while the cast and crew were presumably high off their asses on heroin, trying to "recreate the vibe" of Cobain's last days and shooting this piece of crap that wouldn't get a passing grade as a student film.
In fact, I venture that the only way this movie could possibly be enjoyable is ON large doses of opiates.
Avoid.