Typically I don't like watching high school cdramas, because censorship makes it near impossible to portray a reasonable romantic story in them and also they often have content involving parents & teachers that I abhor.
This drama is a standout in in this genre in the sense, that they've shown innocent but very sweet high school dating. At times I was wondering how this passed censorship. Then later on ML's momster came and forced a 1 year separation, so everyone could focus on their studies & then I thought "okay, so that's how". There were also various moments in the drama, when the leads were vehemently denying their romantic involvement with each other, but it was never in doubt. It was very strongly implied that they knew each other's feelings and they did everything dating teens would do, other than skinship that is.
(This is the second crama I've seen that is like this, the other one was 'Meeting You')

Basically the show can be split into three parts.
1) The kids getting to know each other. (first 5-9 ep)
2) The friend group of 5 enjoying their best life. (this is very close to 10/10 amazing)
3) College, young adult life (last 6-7 ep)

I would say 1) is not great, initially I found the show to be the most typical Chinese high school drama I have ever seen. I was fully prepared to drop it, but I did not really have anything else better lined up & I needed something to watch during my late night workout sessions.. Upon reaching 2) I was very surprised, suddenly everything started working for me and it felt like I'm watching a different show, where EVERYTHING is better, including the acting, the editing and even the background music inserts. In fact episode 10 is one of the best cdrama episodes I have ever seen, it was absolutely magical.
After the forced separation we quickly transitioned to college life & adult dating. While I tend to enjoy a simple, fluffy and complication-free happy ending, I felt 3) to be lackluster in many ways. I really liked the second couple & they barely had scenes there. Much of the non romantic plot earlier was involving ML's brother & momster. FL did not meet ML's mom during the adult part of the show, at least other than us seeing the mom sitting there at their wedding there has not been anything else. The brother also only had like one line during the wedding, would have been nice to see what happened to the genius. Also there were at least two occasions when I felt the writer set up some big cathartic faceslap moments and the then things just fizzled out, not cool! Give me my loud slap! To sum it up, in 3) we just went through the motions without enough emotional impact. (well there was a little of that in the finale, maybe)

Anyway despite the negative points this one is absolutely worth watching, perhaps even just for the bromances, but to me 'A Love So Beautiful' -despite that annoying Wu Busong and the breakup- is a much better cdrama that is largely similar to this one, but feels far better overall. It's better acted, has several really epic moments, the final episodes are very satisfying and it's amazing from episode 1 onward etc etc.
Of course if I started to compare it to the best university/young adult cdramas then it would just fall short.

TLDR: It's the second best high school cdrama I've seen, but usually high school cdramas suck, so 8/10.