A premise: I haven't read the original manga nor have I watched its anime adaptation, therefore for humble me this "RoOT" drama was a completely new story.
And I'm happy to be able to say that it's been an extremely satisfying journey from the very first minute to the very last!
The plot is very intricate but the writer(s) managed to wrap everything up nicely, all doubts were resolved, all questions answered - which is a lot more that can be said of many such dramas which instead tend to lack dramatically in that aspect.
The cast did a pretty good job, as a whole.
The "packaging" (production value, music etc.) is top-notch, period.
Perfect 10 as far as I'm concerned!