This was amongst the first K-dramas I saw. I found it a good mix of romance and action with a bit of humour.
Although it did have some clichés and stereotypical plots and characters, I did enjoy the series.
This is the role I’ve seen SJK in that I liked him the most in.

Considering this is such a classic, I should probably write a more detailed review, but instead I will say it like this:
It definitely helped me get hooked on K-dramas.

Watching it today some effects and characters will probably seem a bit outdated.