I thought the last episode was fantastic. It really pulled the rest of the series together. And, it was a happy ending. It gave a new theory concerning life after death/moving on to the 다음 life.
Okay I 사랑 사랑 loved Lost, but the whole purgatory thing in the last episode wasn't exactly the best but I well say it answered a lot of questions, so given the type of show it was pretty good