I really loved the 2 main leads together, their chemistry is really good.
One thing I really like about this drama is that both ML and FL are mature and there wasn't any misunderstandings caused by communication problems like in many dramas. They say what they needed to say and cleared up any unhappiness immediately when something happens. They stick together through thick and thin and never let anyone get between them.

The character development for the leads was also great. The FL comes from a well-off family and started off making a few snub comments regarding the ML spending all his time earning money instead of studying like what a student should be doing. But over time she came to understand ML's actions and also encouraged him to change him for the better. Great and natural interactions between them.

Its a pity they did not put much effort into the 2nd couple. Gu Xiao Man blindlessly continues to love Chen Yi Chuan without any reason, and even after being treated badly by him continuously until he finally realises his own feelings. They did not justify the reason behind their feelings and also there was no growth.
There is however growth in Chen Yi Chuan's character himself than his love line.

Overall I'm head over heels for the main leads and would definitely rewatch this again.