Things I liked:
-Loved the relationship between ML and his two ghost partners. Yoo In Soo as Sung Ho and Eum Moon Suk as Nam Goo were both very good. There was quite a bit of humor when these three were involved.
-FL's friend the attorney that climbed up the hill to her office. I LOVED the yellow suit she was wearing.
-The way they styled ML. Loved the color of his hair, it set him apart. I also loved the clothes they put him in, loose, comfortable clothes.
-2FL storyline (for the most part).
-I liked the cameos.

On the other side of the coin:
-ML and FL had no chemistry, as far as I was concerned. The whole thing seemed kind of forced to me. However, they didn't have the cliche misunderstanding breakup.
-Some of the filming was extremely dark. If you aren't in a dark room when you watch it, you'll miss stuff.
-I didn't like the character of the FL at all. I don't care for forward women, and she just couldn't get the hint.
-Continuity issues - they are drinking in the park at night, and suddenly when they are walking home it's daytime.
-I felt that this show suffered from too many episodes. There was a lot of wasted time.
-The cop ghost - didn't like the ending of his story, or his lack of resolution with his wife.
-The 2FL and the office ghost in a relationship? Please, that was just too ridiculous.
-Though it was a happy ending, I was pretty disappointed in the show once I finished it.