Lesson learned: never judge a drama from it's title.

I put off watching this drama because the plot didn't sound very promising and I especially hate the annoying third party arc in a lot of dramas but after reading reviews, I finally took the plunge and happy that I did.

The story line was interesting in that they have some supernatural elements that seemed plausible. There was a good moral to the story, the side/supporting characters were all interesting, the friendship deep, a filial son, very supportive parents (Oh Hae Young's) and a great love that went through a lot of challenges.

Pros: different types of love were shown - parent's love for their daughter, brother/sister relationship, noona romance, May-December romance, love and loyalty between friends and co-workers, et al. 
Cons: there was not much difference between the 2 Oh Hae Youngs, beauty-wise. I really wanted to give the main Oh Hae Young a good hairdo but she was equally pretty as the other Oh Hae Young.

I'll stop here as I do not want to spoil anything by giving too much info.

Bottom line: Watch it!