Don't drop this drama if you still thinking about it. I don't know why you want to drop this. This drama surprised me in every episode. Don't listen to others, give it a try. Even if you have not familiar with the ML or the FL, or the other casts, it does not matter. But i doubt you have not familiar with them since they are a familiar face the industry.
My honest review, the writer did it beautifully in all aspect including the back story. It was taken so beautifully and explain in brief way just enough to tell the back story of the couple, the general and the devil.
There is no force love between the couple, unlike some drama. The comedy is on point. The things i like most:
1. The chemistry between the leads
2. The ability of the ML to change characters
3. The funny ghosts worker
4. The actors that played the villains are good
5. The cinematography in the historical scenes
6. Pong Baek (he is hot)