I mean, where do I even start? Hum..

I'd say the story is really good, the acting is extremely convincing, the FL is highly likeable, there's no way you can hate her, and ofc... our Male lead. I really enjoyed his character and their romance, omg, how can they have so much chemistry like that? They worked perfectly well together.
So yeah, I really really really liked the Kdrama BUT, as I said, it's a mix between Worth watching it and a not worth watching it. I mean, if you go for the romance so yeah, totally recommended. But if you go looking for a well made and written story so you may be losing your time with this one.
There's some blank spaces and no answered questions within the storyline and the ending is kinda messy too, and kinda fast. As like most kdrama, they go around the brush in the entire story and the ending is always messy and fast, leaving you with a feeling that you were expecting more than you got...

I don't regret watching it tho, This show became one of my favorites because I really liked their love story, but in other parts I felt like I've wasted my time...

Btw, I'd recommend this kdrama to anyone but I'd warning the person that the story has a lot of blank spaces and it might disappoint sometimes, but seeing their love story journey is at the same time worth giving this kdrama a try.