This is truly an amazing series.
It looks gorgeous but the looks also have a purpose the lines (grades/latitudes in
Geography are, after all, lines separating and uniting humans, it's in the title, it's mentioned through the script and it's also all over the photography), the colors, the house interior, where the house is... Fantastic.
And then there is the script itself...
The series can be read on multiple levels, you can just follow the personal dramas as they are told, you can focus on the diversity aspect or you can do a whole lecture on generations. All of them, for me, are valid interpretations. But the most just towards the script is probably to take in all its layers.
Wang, the main character, is probably the most "fantastic" character of the 3, he's quite realistic, but he also represents unlimited possibilities of a maybe better future so he's also the most idealistic of the 3. While Mol and In are hardcore reality.
I can't say much about Inthawut, because I didn't get to meet one IRL. But I did grew up as the child of a Mol, and I can say she's extremely well written and absolutely consistent. It was entertaining (but also true to reality) to see how other viewers perception of her changed through the episodes. From initially seeing her as a cool Mom until the last seconds where they got one last realisation of how truly nightmarish she is in that last scene.
All in all... If you come across this series... This is, IMHO, a must watch. But... It's probably not for everyone. If you are not sucked in by the 2nd episode, if you feel uninterested and bored... Then just drop it, it's probably just not the type of story you'll enjoy and there is no point in torturing yourself. But if you fall in love with it... keep going, it won't disappoint. But maybe don't binge it, leave space between episodes to digest them.