This series is on my to-watch list. Still haven't got around to it due to other commitments. But I have series 1 lined up ready to go. And I know its short series so it shouldn't be such an effort.
Now that I have read your review I am more eager to get started. It's good to read a positive endorsement like this.
It is hard to get to a point to start watching this show, but once you start the end result after seeing every episode is, Black Mirror is damn good.