I loved this drama the first time I watched it, it held my attention the entire time. Sure there weren't many if any angsty moments. Things go relatively smoothly for the couple once together. They have great chemistry together and a ton of sweet moments. If you like shows with lots of angst and drama you probably wont like this one.

Pros:
The leads both actually like each other. In the beginning they have misunderstandings but throughout the drama they actually communicate with each other and demonstrate a healthy relationship.
The second couple isn't forced or given an inordinate amount of screen time. The story focuses mainly on our main couple and their life.
Lack of love triangles. Not that there aren't any, it is just that our leads shut them down and don't entertain them.
The series sticks pretty closely with the novel it is based on which is nice.
The young boy wanting to stand up for the FL and 2FL all the time. I think the young actor did a great job in his role.
I feel like this drama fits well within the found family type of drama. The couple both have family issues, and depend on each other as well as their core group of friends more than actual family.

Cons:
While the drama held my interest on the first watch through I do find myself fast forwarding certain portions on subsequent viewings.
I wish they explained more about boy staying in Beijing, They gloss over some details that explain his situation.
Some moments from their past were shown to much, we got glimpses of past events from each of the leads pov which was nice but sometimes felt repetative.
I wasn't a huge fan of the final episode. I hoped for more even if it was a conclusion for out 2nd couple, or more of the main couple together as family.