I liked this one, I think the drama and story were overall very unique. I liked that the aliens didn't look fake at all in my opinion, in other words, the sci-fi was on point. the ending in other words was very disappointing and when I watched the second part it made it worse because it's so confusing. I'd still give it a 10/10 because overall everything stood out to me. I think the first episodes in the second part were so cool, and every character had a huge development. if you are looking to watch something different I recommend this. This was even different than All of us are dead. Which is one of my top dramas, it was different. I can only hope for a third reason to make it make sense in my head. Honestly, I suggest you stop watching after ep 6, although the beginning of the second part its super cool, and you can see all of them coming together and helping each other. I read lots of comments saying the it shows the typical other drama's story but it was different for me given the situations they were in. I recommend dit though, its different and not boring at all.