I have just finished watching this epic on Netflix and, in short, I have to say it is well worth sticking with it, as ultimately it is hugely rewarding on so many levels. Looking at a show like this with a western sensibility, we have to talk of some elephants wandering around the room.
Firstly the era in which this drama takes place means the depiction of strong class and social positioning, showing a degree of respect and politeness rarely seen in the west, except perhaps in the 18th century. The mannerisms and dress take some getting used to. The viewer must also get used to the fact that everyone has at least two names: given name, courtesy name, and sometimes a formal name. All the major characters belong to one of five clans.
Secondly the pacing of this series is likely to be difficult for a generation with a short attention span and a video-game paced expectation. This series has many periods of long glances, involved speeches and lengthy exposition. Sometimes it's difficult to know why some characters get so upset over things that are apparently so trivial. These social orders are strict indeed.
Then we spot that there are fifty one-hour episodes, a daunting thought, but more of that later. I would advise checking out more knowledgable reviewers to gain more insight into the clans and the people in them.
I cannot speak to the original novel. I have searched but cannot locate an English translation. Much is made of the relationship between the two male leads and, by all accounts, this is much more explicit in the novel. Nonetheless it became clear to me early on that there was attraction between the two that was more than just brotherly love.
The story begins with events leading to the death of Wei Wuxian (aka Wei Ying and the Yiling Patriarch). After this we are taken on a lengthy flashback detailing the development of the friendship between Wei Wuxian, the demonic cultivator, and noble and intriguing Lan Zhan (also Lan Wangji and Lord Hanguang). We learn how Wei Wuxian is framed for misdeeds and killings he did not really do. Some years after his death Wei Wuxian is revived by illegal means, is reunited with Lan Zhan and they embark on an investigation as to who is behind all the feuding and the discredit of Wei Wuxian, although this has been hinted to the viewer already.
Many of the confusions of earlier episodes begin to get resolved; you will easily find spoilers elsewhere if you want them. Suffice to say the final half-dozen episodes reveal a great deal and the end is satisfying.
The spectacular scenery, stunning costume design and and decidedly attractive cast make this whole journey unique and exciting. I have found the animated version online and have started watching that too.
The two leading actors, Xiao Zhan as Wei Wuxian and Wang Yibo as Lan Zhan, are mega-stars, across east Asia these days and they appear together on all kinds of tv shows (see YouTube). The intensity of their performances, coupled with the nuanced nods to more than just a bromance is enjoyable and skilfully done in a climate of censorship.
I can thoroughly recommend this, although it is unlikely that many westerners will commit to a fifty episode series and that is a shame. There is much to discover about a very different society and we could all learn much from it.