There was so much to like about this show:
1) Yang Jin Sung playing dual roles of Jang Yi Kyung and Na Noo Rim. She was wonderful, especially since the characters were TOTALLY different. Her coldness as Yi Kyung could actually give a person frostbite! Then she was so bubbly as Noo Rim.
2) Lee Hong Ki as Choi Kang Joo. I don't think this role was a serious stretch to his acting chops, but he did well going from the uptight, cold chaebol to the sweet man he was with Noo Rim.
3) The romance between the leads was fun to watch. I liked their initial aversion to each other and how it slowly changed.
4) I love Park Kin Joo in everything I've seen her in. Here, she played Noo Rim's friend Jin Joo and she's just got that precious, elfin look about her that draws you to her.
5) Overall, I thought the actors did a great job.
6) The storyline, with the added ghost story twist, was well thought out, with lots of twists and turns to keep you interested.
7) The music was lovely. I was also impressed that Lee Hong Ki did one of the songs. It was a heartfelt song that really grabs you emotionally.
What I didn't care for:
1) Noo Rim changed from someone that believes in herself and stands up for what she believes in to a scared, runaway woman.
2) Too many bad guys! Each person was more evil than the last. Plus, though there were natural consequences for their actions, none of those consequences helped the couple at all, that's for sure! Also, they had information on things that these bad people had done and didn't go to the police?
3) Not enough time of seeing the couple together. They were actually together for just a brief period of time, which made their breakup doubly irritating. First, do you love each other or not? Are you not willing to fight for your relationship? Plus, I didn't think their breakup was realistic because breaking up just so no one else will be unhappy is a cop out.
4) The ghost story aspect was woven through the episodes and then resolved in a very rushed fashion. It felt like the writers realized they were getting to the end of the show and had to squeeze it in.
5) The ending was so unsatisfying for me. I loved how he continued to look for her. I felt that her keeping herself from him was unfair to him (not going to say more due to spoiler). But, after them being apart for so much of the entire show, when we got to the end and they are walking in a garden and talking about a tree? I wanted/expected more romance.
So, I'd say it's a good show to watch for the acting/writing/music as long as you are okay with a lot of angst and not very much romance.