Even great cast can't save the drama if there is no story and very uninteresting characters.
They tried to fit this drama into different genres - horror, comedy, romance, suspense, revenge. But this show belonged nowhere.
Horror wasn't scary, Comedy was average (though I found very few scenes funny), chemistry was so-so, suspense was predictable except 1 or 2 little things. revenge went nowhere as the ghosts left.

I think they should have made drama Ghost's love story rather than Lovely Horribly. Drama in a drama concept fails miserably here. The fortune stealing & sharing concept was Good, but story went nowhere with that because of zero chemistry and horrible execution. Maybe concept was there but writing was ambiguous.
The questions in the story are ridiculous and answers are even more ridiculous.

Characters are not good enough. Only character seemed plausible was Sung joong played by Ki gwang.
Main lead were circling around here and there with same story.
I wonder what made PSH and SJH to accept such stoyline.

Not even worthy of one time watch.
Music was average. Even horror scenes didn't felt horror as music wasn't compatible.

I have bad habit to finish the drama till the end so I watched it. I would not recommend this to anyone unless you are huge fan of Park shi hoo and want to watch him again in similar roles like - Cheongdamdong Alice ( I loved his role here, drama was diferent too.) and My golden life.