like after the duke pins the blame on the commoner, it's revealed that he made a beastgirl daughter with a slave, and he enslaved the daughter, and all for the sole purpose of using her as an assassin. And then he uses this assassin to track down and kill a commoner whose death doesn't make a difference to the duke...
My conclusion: If you like xianxia, read this novel. If you don't like xianxia, read this novel.
I want to start by appreciating the main character of this story. He's an honest-to-goodness good person and he treats other people like they're also good. That's such a rarity for xianxia that this novel is worth reading for that alone.
What else sets this novel apart? A cast of memorable characters, for one. Cultivators in this world have obsessions, confidence, and shamelessness (because you don't say "I'm gonna be immortal!" if you don't have those things). So everyone Song Shuhang meets is interesting. Song Shuhang himself, aside from being a Nice Guy, has the great habit of speaking/acting before thinking no matter who or what he's dealing with... With actual consequences.
Another thing the novel does well is humor. I highly recommend reading other xianxia before reading this because a lot of the jokes are based on the difference between what you'd expect from xianxia and what actually happens. It's not totally necessary because the author's pretty good at setting up jokes though.
The story itself is just the main character's path to immortality, like any xianxia. However, it's not driven by revenge and arrogant young masters and face slapping and saving beauties. If anything I'd say it's driven by adventure and exploring the mysteries of heaven. The pacing is excellent, too. It seems really fast, mainly because one thing happens right after another, but it's not skipping anything. The explanations don't feel overdone. The world is interesting enough that both Shuhang and I feel like exploring it more.
Finally, the harem. Just kidding, there's no harem. Shuhang's a bit too busy to think about that sort of thing and the women who are interested in him... are also busy because they're not the kind of characters who stop having their own lives after they fall in love. Cultivators live a long time so there's no need for them to rush into a relationship with someone they've only known for a few months, after all. It's not completely devoid of romance, and at least one fairy maiden will go on the attack (again, something extremely rare in xianxia).
Even the food from the "real world" that he brings over is mostly good because it gives stat boosts to people eating it. It gives the kind of rush people describe when they dope up on stimulants, so of course adventurers and battle maniacs like Fel would like it.