ok first of, this drama in my humble opinion has a soundtrack that really can pull at my heart string , even though i had to find a translated version of the lyric to fully understand the lyric.
The drama may have some problem in plot and editing but i think it affected at a minimal level, because majority towards the end many of the questions has been answered. I think the only thing they forgot or the editing department was in a rush or for some reason the Yunlao's master aka the spirit sword just vanishes with no explanations.

I know with some holes here and there in this drama but this is what happens when a story that has many chapters and plots is being cramped into less than 30 episodes. Overall, it was enjoyable to watch.