i dont write long reviews. so you can have doubts if i write long story short-
one of the best K-drama i have ever watched, the all-the-time-on-the-run attribute of this drama instigates the thrill feeling, yet to provoke a person to gulp a chill-pill , that feeling cant be described in words, you have to watch and see, dont blame me  if you smile after watching every episode...

The story is so meticulously written that i have no complaint. it is sophisticated yet very well organized.
 The male lead Park Shin Yang's performance was refreshing , the female lead has done her work well. As for the other actor and actresses, without their beautiful performances , the main leads' good acting would not be enough.

Honestly, this is the first time i have liked any music in a K-drama and it will make you bang your head automatically.

Yes, it has re-watch value up to the mark. Believe me at your own risk.