The tone of the show from the start is very opressive with all the characters basically lock up in the building. We see very fast how humans could be even worst than monsters when surviving is a factor.

All the actors are amazing specially the ML Cha Hyun So and Lee Do Hyun, this one performance is on point at every minute and i actually end up hating him a little even when i understand why he did the things he did (In parts).

The monsters for me, some are great, some not so much, but overall i like them and the different types.

If i have to say something negative, the kids at times were a little annoying to me. I'm not much for kids in this kind of shows so really i could have done withouth them.

That scene of the ML in the last episode just before the end... it was one of the hightlights for me.

All in all i can't wait for the next season :).