A great drama, we're never bored in this mix of fantasy, medical, and investigation plot.
Rain and Kim Bum's duo is just perfect, funny and teasing each other all the time, yet being supportive and working as a badass team. The secondary characters, humans and ghosts, are very interesting too.
There are also a lot of life lessons and plot twists coming along the episodes.
The ending is fulfilling, they're tricking us once again and it's very touching too. Somehow I didn't want the show to end!