An utterly captivating drama, perfectly executed over four episodes with not a single flaw to be found.
Top-notch writing, precision directing, exemplary performances from the entire cast, seamless editing, with music and cinematography that intelligently don't make themselves noticed (so nothing showy or artsy, just excellent scene-setting) perfectly paced with an overall sense of all-round good storytelling.
Every moment of this true-life drama was suffused with authenticity, integrity, and verisimilitude, with no audience manipulation to be detected (which doesn't mean it wasn't there; just that it was artfully and subtly done). This is a rare gem that is worth watching more than once, although the subject matter is grim. Top marks.