Well, it's finally out. About time, although it will probably be supplanted by the recent inferior CBS remake this year. Shame, really, as this is a closer version to the book than that horrible Sweeps Month attempt. After viewing both, I must disagree with the recent critics reviews. Railsback plays Manson far more convincing, and even though many complain now that DiCenzo plays a "paint-by-numbers" version of Bugliosi, Vince himself comes off very similar (in real life) to this version. Sorry, CBS, even having Vince at the end of your "event" did not help.
Features? Well, none, really, which is a shame, but what could you put on there? Geraldo's Manson special from over a decade ago? Pages and pages of court documents? The stupidest idea I heard was a "Where Are They Now?" bit -- honestly. Maybe the actors, yes, but the actuals? Please. The extra hour of footage, normally lopped off by TBS (who used to show it A LOT) and the other broadcasters is fine enough with me. Don't know what you could have added to this, as a director's commentary seems out of place, interviews with the cast -- well, memories tend to fade that far out. Footage of Manson speaking just adds to the bizarre aura he still has, and frankly I'm tired of hearing him speak what was once known as the English language (I don't know what to call what he does when he opens his mouth without offending many).
Nothing beats the book, but if you need visual, this is the best one. Not definitive; that's what books are for, remember? Not for the squeamish, for sure, as some of the material is very disturbing, but with the "extra" hour of material, the purchase is cheap and worth it. Besides, real life can be more distubring.
Almost 30 years later, it is still as close to the book as anyone will ever come. That's definitive enough for me.