The details are still appalling, but what we see and hear in Dan Reed’s riveting and sharply convincing four-hour documentary, “Leaving Neverland” (airing in two parts Sunday and Monday on HBO), supplies the viewer with an unexpected measure of calm. Even the outrage feels at last like the real deal, instead of the manufactured byproduct of tabloids and TMZ.

Unlike Lifetime’s recent Surviving R. Kelly, Leaving Neverland doesn’t need to make an airtight case against a wealthy pop-music legend who still has access to vulnerable young fans. Yet it’s the absence of that active threat (if not a competing narrative from the Jackson estate and a few obsessive fans) that frees up Reed to focus on a wider-ranging inquiry into what it means to be a survivor. Viewers of all genders and ages who share that experience are bound to see their own stories in that of Safechuck and Robson. That’s more than enough reason for this eloquent documentary to exist.

Leaving Neverland has justifiably drawn criticism for being one-sided. It notes Robson’s lawsuit only briefly and never mentions that Safechuck filed a suit of his own. Those are flaws, but the stories of these two men are too compelling to ignore. A riveting story of childhood sexual abuse and its devastating effects on survivors and families.

For all its gripping testimony, Leaving Neverland is not a great documentary. It is too long, for one. ... None of this diminishes the power of the interviews, which show how much damage Jackson did and continues to do, 10 years after his death.

Leaving Neverland is heartbreaking and hard to watch for many reasons, among them that Jackson is such a part of our collective history. While there are pacing issues here and the filmmaker could have used a few more sources to widen the story, it’s a compelling look at childhood trauma, fame and the mechanics of pedophilia.

A harrowing watch, the soaring orchestral score from Chad Hobson providing a jarring counterpoint to Robson and Safechuck’s graphic accounts of the abuse they say they suffered from Jackson over several years. ... The documentary maker’s credulity is valiant, but it also prevents Leaving Neverland from achieving the same scope as his other works like Three Days Of Terror (another HBO production) or his Emmy-nominated documentary, Terror In Mumbai.

It’s a harrowing account that doesn’t turn away from the brutal realities of what the men describe as meticulously plotted seduction and rape.