This series is amazing! Coming from a North American Kdrama addict point of view, this series is Hollywood movie quality. The effects, casting, and delivery is top notch. It really shows how much Netflix put into this series. The monster effects looks extremely believable and realistic. It's not Sweet Home quality monster (which still looked a bit webtoon), G. Creature literally looks like an experimental horror that could crawl out of the television. The make up effects looked realistic. By episode seven, all the bruises, cuts, blood, and even dirt literally looked totally realistic. Yoon Chae Ok's black eye even looked swollen. Her facial structure and features almost didn't look recognizable. It was so realistic looking. The parasite looked real in the water, and crawling under the skin. I loved the slow motion effects. The transitions seemed smooth and flawless. I loved the first encounter face off between Yoon and Jang, when her hair dramatically swirls around her face as her cap is knocked off her head. So beautiful. The cherry blossoms are so beautiful too throughout the series. The dated clothes, the streets, props, and even the hospital. Extremely well done. Allot of the filming angles even looked very artistic and beautiful. The cliff hanger where they left it at the end of Part 1 was the best place too. I'm glad I only have to wait a week before Part 2 is released.