My personal "10/10 is not enough"

Just insanely good. Every time I watch it, I have a great time.

Absolutely excellent drama full of emotion and laughter. A real emotional rollercoaster with an interesting plot and brilliant acting. Ji Sung is absolutely phenomenal playing seven different personalities and I haven't seen such a bravura performance yet. This drama is beautiful, brilliant, absolutely gorgeous. Something wonderful!

I approached this drama three times before I managed to finish the first episode. It was boring and a tad discouraging. However, by the time I got to the end of the first episode, I was fully invested in the story and the fate of the characters. It's intriguing, suspenseful, thought-provoking and keeps you engaged.

The funniest, most interesting c-drama I've ever watched. I love ML who is smart, clever, courageous and has his principles. This drama has it all: interesting plot, excellent characters, great humor and some scenes that give the viewer real satisfaction. Wonderful entertainment!

A mystery that interests from the first to the last episode. Greatly dosed tension. Excellent acting. Music composed perfectly for the drama. Excellent.

I love the originality of this drama. I love the Oscar and the Golden Iron Triangle. I love the intelligent and funny dialogues. The plot has some shortcomings, but the overall atmosphere of this drama is pleasantly warm and I spent a lot of enjoyable hours with it. A few scenes are really priceless.

Excellent humor and a wonderful gallery of interesting characters. Although when it comes to production this drama has some shortcomings, great dialogues and ML make up for all the shortcomings. I love the songs from OP and ED. Overall, Ning Que is my favorite character from all the c-dramas.

"If you look into the abyss too long, the abyss will look at you." A person who encounters unimaginable evil on a daily basis, especially an empathetic person, is exposed to a special kind of danger. I appreciate that the filmmakers did not make this drama another sensational story about chasing serial killers, but focused on the psychological aspect of the work of the people who catch them.

Bravura acting. Excellent plot and great dialogues. Additionally, an emotional story with a criminal plot and a positive message. What more could you want?

It is not a perfectly shot drama, and yet I value it highly as a remarkable example of a really well done psychological drama, where intellectual perception is combined with emotional perception perfectly. Some episodes have left a permanent mark on my consciousness and I appreciate it very much.

It's amazing how much this drama kept me in suspense. I seemingly knew ML wasn't going to die, at least not until the end of the drama, and yet the situations he found himself in were highly disturbing. A rare flower to make me so uncertain about a character's fate.

This is my first k-drama and I guess that's why I like it so much. Full of action, humor, interesting characters and interesting scenes. I have a great fondness for it.

I had a really great time with this drama. Superbly acted, full of humor, action and original dialogues. Plus a really handsome Ji Chang Wook. Great entertainment.