People are either too harsh on this drama or overhype it too much. It's well-produced with a great cast, and the writing is fine. It just feels...average. It follows a very typical fantasy kdrama plot, and falls into the common pitfalls of getting slow towards the middle and recycling tear-jerker tropes towards the end. It was enjoyable to watch, but after watching numerous fantasy dramas, I found there was nothing too special about it. I would recommend it for casual watching, but not to someone who wants a masterpiece. (It does get bonus points for giving a love triangle to the second leads instead of the main couple.)