Disclaimer: I have read the novel but haven't seen the older adaptation.

This is one of those dramas that have flaws but you still keep on watching. The story is rather interesting. Even though unrequited crushes plot are dime a dozen in dramaland, this one features a female lead who uses her affection as a driving force. Actually pursuing relationship with her crush isn't really a priority for her. It still happens as the drama progresses, but the way it develops is also full of twists and turns.

One of the things I liked a lot was the OST. Rarely I go out of my way to listen to songs featured in dramas, but here the music really works for the story and sets the mood.
Another was the friendships featured in the drama, especially between Luo Zhi and Baili.

The acting is pretty decent, everyone seems to be on a similar level and the big ensemble cast works well together. Majority of characters grow as the story progesses, and character developement is very prominent. The amount of ill-willed characters is sometimes overwhelming though.
Both leads did a good job as "two geniuses" and I pretty much have no complaints. Especially female lead is a more composed, calm type of character that can be hard to find in dramas, and the actress nailed it.

The story is right up my alley, so I'm obviously biased, but I liked it. Yes, it drags and is flustrating sometimes, but it more or less makes sense. There are cliches and also plots I wish would get less screentime though.
The idea of male lead being someone worth yearning for 15 years isn't easy to translate onto screen, and I felt like excution of that was lacking. At the same time, the novel isn't really about him being a perfect guy, but just someone the female lead likes for what he is. She likes him for him, but for a watcher it sure can be confusing.

One major gripe I have is pacing. As much I understand why there were new plots added to the original story, I wish (especially at the ending) that wouldn't come at cost of original novel plot. This is a decent adaptation that more or less emulates the feel of novel, but at the same time I wish the ending chapters would get more screentime. The beginning part could be compressed into less episodes of you ask me. Also all the flashbacks, present in every episode, had me fast forward. I'm really not a fan of rushed endings either...

One thing for sure, this drama is not for everyone. It's slower and abudance of "villains" can be tiring. I enjoyed it for what it is and had good time watching, but at the same time, I'm not sure if I would wholeheartedly recommend it to just anyone.