Absolute perfection. They story was well paced and interesting. There was romance but it did not detract at all from the story, it just added another layer. The supporting characters were well written and acted. They provided comedy and sadness. The sound track was amazing.
The ending was well done and did not feel rushed.
I will watch this again.

I really like Jang Nara as an actress so I was excited to watch this. The whole cast is excellent and the story while seemingly typical for a crime drama had a lovely twist I didn't see coming. The bromance is excellent and the romantic subplot is subtle and well done.
The only thing I didn't like was how obvious the "bad guy" was. I knew his identity very early on and I had avoided spoilers. But maybe that was the point.