This drama is outstanding in my opinion.
I think that the first 4-5 episodes are a little slow, but that it gets amazing quickly.

Story: Complex, enchanting, full of deatils and the scenes are well planned. Many things that happen early in the drama is revealed to be of great importance. For example, the promise between Lan Zhan and Wei Ying to always be on the side of justice.
Or the reason as to why old master Lan is so against Wei Ying's methods.

Yes, some plot armor are present, and plot holes, for example, how Xiao Xingchen didnt't recognize Xue Yang's voice. But in the big picture, it doesn't really matter, in my opinion. There are not many plot holes.

Music: Very nice. Unforgettable. Listen to the soundtrack on spotify a lot these days. Really awakes emotions. Especially the music in the scenes with Wei Ying's flute.

Acting/cast: Very good in my opinion. Especially by the villains that become more apperant in the second half of the drama.

What I liked the most about this drama is that there are no kisses or anything like that, because it's not needed in order to prove Wei Yings and Lan Zhans unbreakable friendship. Instead, we understand it through their actions and not by kisses or romantic scenes, which I loved.

I also find the villains and one of the main themes of the drama excellent; “what is evil, and what is good?”

Lan Zhan has also taught me to be calm and deal with things calmly.

Overwall, first few episodes maybe a bit slow/confusing, but they can be enjoyed as “the calm before the storm” in my opinion.