I had already seen My Girlfriend is a Gumiho and so I thought it was interesting that Lee Seung Gi was in another drama about a gumiho. So this was one of the reasons I watched it. Let me just say that Gu Family Book is AMAZING! The story was interesting and had me instantly hooked and the OST is beautiful. The romance was adorable and made me happy. I understand that people didn't really like it, but to each his own. I personally loved it and I definitely will want to see it again.