For me, giving this a 10/10 doesn't really mean it's perfect, but because I had fun while watching it.

The first few episodes was really great, they show the characters in a way that will make you ask , think, and anticipate the next episodes to know them more. But as the episodes go, the joy to watch this lessens. But the great thing is, even though you don't like the flow of the story anymore, all the character gets more interesting and lovable that's why you'll still continue to watch it for them.

I don't think this drama is boring that's why some don't like it, but the plot of the story gets predictable. The relationship between Kim Je-Ha and Anna is too fast and doesn't have a nice development story. I believe, overall, the character of Anna doesn't have a good build-up story at all. Also, why did they make Je-Ha like a superhero? He's a human, it's impossible to knocked down 10 men while you are bleeding to death x_x.

But I won't lie, I still had fun, I like the action scenes, the acting, and the side characters. Especially Choi Yoon Jin. I don't know how to address her character, if it's a villain or not, but every time she's in the screen I can feel her emotions. And I also liked the ending scene.

Is it recommendable? If you like action dramas, then I would say yes, I believe it is recommendable.