As a AOS fan from S1, i was worried about how the ending will be. But the ending was very satisfactory. The story was little slow at first, but the second half moved a bit fast. I cried at the ending. Overall, I recommed this drama cause this genre is very arre in kdrama. I don't think there is a drama that has a story coinciding wuth AOS. The whole fantasy theme is very different, which makes it unique.
Talking about the cast and acting, I would applaud the team of AOS for casting brilliant actors that are perfect for their roles. I cannot imagine any other actor giving justice to all the characters of AOS. The acting and chemistry between the casts is also top notch. Specially, the trio of Uk, Yul and Dan Gu and my favorite couple Crown prince and Uk. Everyone gpt their happy ending and the series wrapped up beautifully.
So, give this drama a try. I hope we can all find our light and shadow soon!!!