At times, it is excellent. The interviews are very good and it does a really good job of showing how not just the festival but other events of the late '90s tie into some of the issues our society faces today.
I had never seen a lot of the archived film from the event and the story of the man who died during the event is well told and heartbreaking.
I also appreciated how they showed how the original Woodstock has been glorified over the decades and people continue to exploit that. The two "organizers" of the Woodstock 99 event are two of the most arrogant people I've seen in some time. They took no responsibility for anything and blamed much it on MTV. They came off as jerks, which I suspect they are.
Now, a couple of complaints and they are big ones.
1) The filmmakers correctly point out the exploitation of women that was going on and how it was just magnified at a booze- and drug-filled event like this. So, why continually show topless and naked film throughout the film? I think some of it was necessary to get a feel of what was going on but after a few minutes of it, it just felt exploitive -- which is what they were complaining about.
2) What the hell did the reference at the end to the Coachella Festival mean? How are the two events remotely related other than one happened three months after the other?
3) I know some of the acts involved probably declined to be interviewed but would love to have known the motivations behind some of the things they did. That was, shall we say, an interesting concert lineup.
I would recommend it for sure but what could have been a great film delves into being merely a good one.