I try to write this review as objective as I can despite I'm a huge fan of Xiao Zhan.

Story:
When I watched the drama trailer for the first time about 2 years ago, I thought this will be like another sweet idol drama, which the main characters are beautiful and dreamy visualized. But the story proved that the first impression is not correct. This drama's story is not contain deep heavy topic, just slice of life theme which is very familiar with our daily relationships matters. It is so realistic yet so philosophical that you even can applied the way they solve conflicts with logical way and healthy emotion. Although the background of character's jobs are in the specific field as doctor and musician, there are no complicated terms of medical or music inserted in the story because it mainly just focus on the relationships, how they built it up and maintain in till the end. This is a sweet romantic drama but not exaggerated in physical passionate love, more about mature and traditional value based love.
The pace of this drama is adequate, with little spark of comedy in almost every episode. The side characters are not much developed, the focus is mainly on two main characters and the FC's family. What I like from the characters are they are not perfect, they have flaws and they never stop learning how to live with each other's flaws.

Acting:
At the beginning, I heard lots of complaint about YZ and XZ acting, either too exaggerated or too stiff. But after entering the quarter of this drama, the audience has learned that it is because of the character's background which made them act like that. The most surprising of YZ's acting is when I thought LZX is mostly another copy of Tong Nian (YZ's character in Go Go Squid), she delivered another character's trait that made me realized that LZX is different and YZ has given a new soul to this character.
I think I will be biased when talking about XZ's acting. XZ never ceased to amazed me with his soulful acting, every character he depicted is not the same, is very unique and has their own life. From the BTS, you can tell that Gu Wei is not Xiao Zhan, and Xiao Zhan is not Gu Wei, they truly have different personality. I'm now in the mode of addicted to XZ acting that I can't wait to watch him in another drama.
The chemistry between characters, specially the two main characters, are natural, so overflow that you almost can't tell the difference of their acting and their real relationships.

Music: The OSTs which were sung by the two lead actors are very stunning songs. Ones of the most beautiful theme song of drama.

Overall: This drama is a masterpiece. One of my all time favorite drama, specially after having drama-slumped for about half a year.