I liked the show at the beginning, but it started feeling as an anti-climax as the end was near. I was really disappointed by the final episode. I don't know, it just wasn't what I expected.

I liked the story though, I just kinda felt the magic was gone in the middle of the series.
The music was really great, I loved every song (and downloaded them).
The actors were also good, although it wasn't always believable (partly the story to blame), I enjoyed watching Ah Jung's crazy outbursts.
Re-watch value is low, since this is a series I won't forget so easily and I personally don't like re-watching things, but that can differ for each person individually.

Overall, I would give this series an 8, because it kept me interested till the end and that is the meaning of a show, so they succeeded in this. This drama is recommendable, since I really wanted to keep watching and knowing what happened next. That's the thing that counts, isn't it?

I hope this helps ;)