I will admit that I started watching this drama because of Ji Chang-wook... and it took me a LOOONG time to finish, but was worth it in the end. When I started it I didn't realize that Kim Ji-won was in it and I'm not a big fan of hers (to this day I've only liked her in Descendants of the Sun) and I think that is a reason why it took me so long to finish this drama.

It's overall a really, really good drama. The format takes a little bit of getting used to but it's definitely worth a watch.