I think that this drama is unique in the sense that it shows the lives of all the characters, and to me, its more of showing people coming together to form a community, with extra focus on the leads, rather than everyone being there for the sole purpose o telling the stories of the main characters. So it is important to note before watching that there are quite a few scenes showing the lives of the people, which some may find boring, but I found it quite beautiful in the grand scheme of things. I liked the plot, and most of the loose ends were tied up, though I do wish they answered a few more questions, as the ending was quite open ended, but I suppose the open-ended ending suited the concept of the drama.
I really do want to give props to Lee Jae Wook for being an amazing scene stealer, as his character, Jang Woo, was definitely my favourite, and I found him very adorable as times, when he would start babbling if he were anxious or nervous.
After watching Goblin, I find that the thing I love the most about it is the chemistry between the cast members, and not just the main couple but, for example, between Gong Yoo and Lee Dong Wook. I think that the OST is very very nice, and at times when I heard it in the background, I felt that it was suitable and made the scene even better. I feel that the story is quite unique and the uniqueness of it was handled well. Although I didn't love the ending all that much, I really loved the general story and the process to which the ending ws reached, thus I would definitely recommend this drama to anyone who wants to watch it.
TLDR: The story was great, the ending ok, amazing chemistry, would recommend