This show was a pleasant surprise to me as I went into it with no expectations, it completely drew me in and got me very attached to most of the characters even ones that were a bit morally ambiguous. Though the story is nothing extraordinary it's a character-based show that focuses mainly on the characters, how they develop and how their relationships change in the midst of the crisis they're facing and it does an excellent job a it.
Nevertheless it does have some flaws, notably the CG which I honestly found quite janky, the monsters looked very irrealistic which threw me off at times especially in the beginning. Not only the monsters but also some basic things like fire and the snow looked very fake which I assume was a budget issue, hopefully the second season gets invested in more. Also, some events seemed rushed but that's usually what happens with webtoon adaptations since you can't fit everything in a limited number of episodes. Overall, I'd say it's a very good show and I highly recommend it, I'll probably be reading the webtoon now.