I'm probably in the absolute minority here but I did not like this show. It did start off interestingly enough and I was digging Xiao Zhan as Wei Wuxian but something (I can't even put my finger on what it was) didn't appeal to me. Maybe it was the plot as a whole or perhaps the fact that I wasn't as invested in the side characters as they wanted me to be, but I had to drop this drama, as hard as it is to admit. I also wasn't a big fan of Lan Wangji since all he did was looking at people with contempt or arrogance and it bored me after a while because his emotions were pretty much nonexistent or at least weren't plain enough for me to recognize. Overall I was bored of his emotionless face and the same expressions. I'm sure it wasn't even Wang Yibo's fault because I've seen snippets of his other dramas and he was REALLY good so I'm guessing it's the way his character had to be portrayed that didn't move me in the slightest. Too bad because I really tried liking this show :(
I don't remember anything about the soundtrack so it's not worth mentioning unfortunately. As for the rewatch value I wouldn't dare recommending this since I haven't even finished it myself but due to its popularity (internationally) I won't be too concerned :)