The story pacing is very well planned out and logical for a melodrama. The transition from youth to adult stage is nicely distinguished making 52 episodes not repetitive at all, bringing a new element of excitement till the last episode. The dialogue is witty and very humane, also appropriate flashbacks are inserted throughout the main story. The characters' experience is very relatable and easily sympathized with great development. The insert songs and music are colorful, at times light-hearted, other times tear bringer.
Lastly, the acting is very natural, even gets better in later episodes. I will definitely rewatch this drama in the future for its romance.
I cried on the last couple of episodes. Overall I recommend this true hidden gem till the last episodes.