If you want to watch this drama, be ready for an emotional rollercoaster! This is the first drama that makes me cry a lot, but also laugh a lot. It combines both dramatic and funny elements wonderfully. Spoilers ahead: The cast and acting were A+!! I was really happy to see Sungjae in a drama and I'm so happy he was such a great actor! I usually am a little skeptical when I see idol actors because I've seen some who weren't that good, but he was really great and I'm happy for him! Gong Yoo and Lee Dong Wook were exceptional! While I wasn't that impressed with Lee Dong Wook's acting in Hotel King, I found it to be exceptional in this drama and I feel like he improved a lot! His friendship with the goblin was hilarious and wonderful, I loved it! This is the first drama with Kim Go Eun I watch and she was great, I think she did a good job and I will surely watch other dramas in which she played! Before Goblin, I knew Gong Yoo from Coffee Prince and I can't say I had any opinion on him, but after this, I'm in love! His ability of conveying emotion is fantastic! I know Yoo In Na from 'My Love From Another Star' and I couldn't really form an opinion on her, especially since I can't say I was impressed with her acting, but I really liked her in this drama! The subject was a new an interesting one for me, but I couldn't really understand why he was cursed even after she pulled the sword out and summoned him back. I would have expected him to age again, but idk. And if you think about the fact that he's cursed to lose her in all of her 4 lives and then never meet her again, it makes it even sadder! Overall, it was a wonderful drama and I wholeheartedly recommend it!