I marathoned this one over a weekend about two years ago or so. It was one of the first lakorns I ever watched after Full House.
STORY: Unique and well-paced. The shift in personality from Mario was a nice touch and really made the drama different. The supernatural stuff felt unnecessary to me, but I rarely like supernatural material in dramas so I'm probably biased. I LOVED the sibling dynamic between Mint and her brother; it was so funny and believable.
ACTING/CAST: Mario does well in portraying the two different men and creating a stark contrast between their personalities.
Mint was good, nothing special. She and Mario had pretty good chemistry, all thigs considered.
Mint's brother, whatever his name was, was SUPER HOT.
MUSIC: Gorgeous and unique. The music helped meld the normal and the supernatural elements of the story.
REWATCH VALUE: It's been two years and I haven't rewatched it, but I think there's enough material, interest, and cuteness to watch the drama more than once.
Overall, a cute and unique drama that's worth looking into for the different plot and the funny characters.