This drama is absolutely worth watching. I can say it because initially I wasn't ready to watch it though there was too much craze about it, I felt its just another historical + present time story but I was totally wrong and I'm so glad I watched it. Story: The story is just amazing, it is totally something new and dramatic in a good way. The suspense and excitement is maintained even till the last. You totally fall in love with romance, comic scenes, action and all of those elements. Its a throughout entertainment and the story doesn't drops low anywhere, each episode and scene is worth watching. Acting/Cast: Such big actors wih their flawless acting will make you love each and every character they play. Gong Yoo being a serious goblin and happy soul both are interesting, Kim Go Eun is so cute and adorable in this drama, Lee Dong Wook alert! you might have a SLS problem here, Yoo Na In is damn good also adding glam to the drama and Yook Sung Jae adds up to the comic portion, even the minor characters act great. Music: OST is great and totally suits the on going situation in the drama. Re-watch value: Yes you can actually watch it again and I definitely will. So I can totally conclude that this drama should be watched, it will make you laugh, cry, feel relaxed and totally thrilled. It can make you feel all of that so go for it without thinking once.