The drama is well made from start to finish. The plot is decent, realistic and very tight (no plot holes). The actors have good visuals and play well. The music is good.
The ML is somewhat of a coward in all matters of physical altercations. His playground is the mental battles, planning and strategy.
If everything is good, why didn't I rate it 10 ?
Everything is good, but not exceptional -> so 8,5
P.S. : If you like a fast pace and hate to sit down to look at the scenery, this drama is not for you. The story takes its time (but without lagging in my opinion) and you should savour it like fine old wine.