At this point everybody knows about their tumultuous and self-destructive relationship with each other and how they adored each other more than anybody else. I can only imagine that this programme really only demonstrates a small amount of what they meant to each other and their successes, downfalls and ultimately, their deaths.
Definitely worth catching up with on 4OD if you still haven't seen it (and can view it from whatever you country you may be in)
I'm not lying when I say it brought a tear to my eye. Powerful stuff.