To start of, I like a lot about this show. I like the main couple, the other 2 side couples but I hoped the would have gotten together faster. I really love the whole ost, especially those the male lead sang and the opening song. I love the leads and the whole cast. This is also a 0 break up drama. The last few minutes of the last episode were very enriching, it gave a very nice closure to the show with "introduction" of the character.
However, what took the 0.5 from this show for me was that I find that 仪式感 ( I am not going to explain the dictionary version of this word but to put it in layman terms, with this drama as the background, a ring or any accessory were not shown in the drama to show that they were getting married. They went to take wedding pictures which were sweet but a ring would have made the story more completed ) was not portrayed in this.

My PERSONAL opinion NOT related to the drama:
[Of course, it is not just about a/the ring, I find that this year some dramas, when they confess, it is very casual in a sense, different from like dramas up to last year. I really hope that dramas do not take this path where confessing and proposing become a bit too casual cause it is kind of a big part in the whole story and in real life. ]

I might have gotten a little carried away but I want to say that this show is really good apart from the lack of formality, I find.
I really recommend this though. All of the cast did a really great job portraying all their characters. It is a MUST-WATCH.
Definitely watch this show and decide for yourself whether it is good or not. If you read, thanks for your time!