I am not a fan of sci-fi or space drama/thrillers but as a fan of S. Korean movies and TV series, I gave it a watch. Overall, it's slow-burning with a somber mood, different from other sci-fis of this kind giving out a realistic feel of their challenges, no aliens or creatures about but something more mysterious and deadly, with intriguing twist and turns and you have to watch all the episodes patiently to really experience the show. There is also a very important message - climate change and the effects on future generations like water shortages which can easily happen if not already. Some of the acting surprisingly was not up to par for me but maybe because this whole project was a complete new experience for all involved. I think, the show would have been better with fewer episodes but for a new director and first attempts at this kind of genre, I was really impressed and enjoyed the show.
However, I like to point out somethings based on the comments/reviews I have seen a lot lately (Squid Game, Hellbound, My Name, etc.):
1) There is so much comparing every recent S. Korean show that comes out to Squid Game. Even the reputable sites that review films/TV shows are doing it. It's ludicrous and at this point aggravating as if all recent S. Korean shows must somehow be like Squid Game to be worthy or that's all they have to offer!
2) I have seen some reviews that seem suspicious and generic whether rated high or low. Sadly, I have even seen few racist ones!! Not sure even any of these ratings were based on actually watching the shows??
3) There is always some comparing the shows from other countries to Hollywood ones as if that is the "ultimate standard". International shows have become very popular in recent years so they must be doing something right. Viewers these days, at least some, are looking for something really original, unpredictable and emotionally engaging and with natural acting and great character build up/storytelling (fast or slow-burning) which is offered more in international films and TV series than the Hollywood productions. You can find reviews/comments to that effect as well.
Anyways, I definitely recommend watching this show because it has a new approach to this type of genre. South Korean filmmaking can be very innovative and this too does not lack in some originality,