It's a good watch and basically a high school survival drama. Starting off it was good to watch till midway. The part one was good enough to keep yourself engaged but the second part was disaster. Suddenly everything became normal for the kids in part two, they became very much competent in dealing with those aliens all of a sudden within 1 month. For me the ending is still a question mark. And the whole part two was a waste of time. The 3 stars are for part 1 which made me watch the series.