Pros:
Individually, FL & ML are on point
costume
make up
sets/props/decor
lively ensemble

Cons:
Together, FL & ML do not generate any feeeelllllssssss aka lack of sparks between the leads
Terrible second lead syndrome with the FireFlyGuy



*SPOILERS AHEAD*

Both ML & FL are good actors with their own charms and characteristics, yet i failed to feel their sparks :(
Both actors brought their A game, yet their romance was still born.
This may be due to the writing or the directing - which seemed to be more invested on delivering the mystery/resolving ghosts' grudges plotline than on the romance.
As a result of this, JangManWol (needing to resolve her own hefty grudges in order to cross the bridge) have more sparks with the FireFlyGuy aka Go Chung-myung rather than the human Go Chan-Sung.
Halfway through the series, I was more invested in watching JMW with GCM scenes (Oh, the angst when he was getting married!) rather than the impending separation of JMW with GCS.

Watch this if you are a fan of ghosts' story line (which this drama totally delivered 10/10) and amazzziinngg dresses/make up on JMW.

Skip if you are looking for thrilling sparks of romance - interlaced with ghost stories.