At first it felt like some kind of Korean drama. Wealthy people trapped in their social struggles. I was wondering "why their life is so boring?" It looked like something just repeats on and on, people talked only about what was happening, and that's it. Like they were trapped. On the good side, a lot of problems were raised, perfectness shown to be imperfect. Characters were so real, so human-like. They had doubts, regrets, we got all sides of events, not just what's happened.
Actors are great - everyone knows these big names for good acting - but kids! They're amazing!
But what I'd give these series 100 stars or more for is choice of soundtrack. Every time a songs plays, it gives vibe to everything that's going on. Montage is beautiful, too.
It's made very smartly, keeps viewer guessing the whole time who's done what. Also, not too long to bore, not too short to feel something's out. Sometimes watching a TV show, I feel like wasting time, not spending it, as if I could watch something better, but decided to entertain myself and do something useless. And this time it wasn't like that.
PS. Can I just mention that soundtracks are wonderful one more time? They are!