I want to begin this review first by addressing it in relation to "A Love So Beautiful."
With the popularity of "A Love So Beautiful", I see a lot of people hoping to find a similar drama to fill the void now that it has ended. There are similarities in the two dramas in the sense that they are set in high school for a majority of the run time and take place during the same time period. However, outside of those similarities, the two dramas set out to fulfill different purposes. With "A Love So Beautiful," I feel that it is a love story first and foremost and the life of a student is given secondary focus but "With You" focuses more on a student's life and how those formative years in high school set the foundation on who we become as we grow older. Of course, love is one of the things that students first start to experience in high school but that is just one of the many items that preoccupy a student's time.

For instance, this drama also looked at how students are tasked with huge responsibility at a young age to make a choice that can very well affect the rest of their lives, deciding to focus on liberal arts or STEM. However, instead of leaning one way, it is implied that one should do their best to be well versed in both in order to be a well rounded individual. We come across many different characters (students, teachers and parents) throughout this drama, each with their own hopes, desires,  fears and dreams. And just like in real life, they will come and go but there will be those that leave an impression on you or impact you in some way.
What I also liked about this drama is how helpful and supportive everyone was to one another whether they were friends or "only" classmates. There was a real sense that high school is just one of many stops in your life and how it prepares you to learn and grow throughout life.

Next, I will speak about the Romance portion of this drama which is what I think most people are curious about. And once again I will speak on this in relation to ALSB. In ALSB there are more displays of physical affection and because in that drama they have known each other since childhood they are more comfortable with one another right from the start of the drama. However, in "With You," I enjoyed seeing Yu Hai and Geng Geng's relationship develop over time especially with the way they got off on the wrong foot in their initial encounter.  It's not to say one drama is better than the other in the way they portray love but that they portray different forms of love. In "With You," I feel that the writer wanted to portray how blissful it is to simply be together with the person you like/love. Whether that means being "desk buddies" and helping each other with math/physics problems or playing video games together. No matter what the activity/event was, as long as they were able to do it together, made it all worthwhile.  Similarly, both characters had their own strengths and weaknesses and complemented each other well and were each other's pillar of support when they needed it. This drama is not really about the grand gestures (at least in Yu Hai's case) but about the little ones. For instance, risking the chance of incurring a strict teacher's wrath by asking him to repeat his explanation of a problem that you already understand because you notice that the person you like is having a difficult time catching up but is too afraid to ask.

Ultimately, if you're looking for a drama replacement for ALSB, I suggest you look elsewhere. However, if you're looking for a drama that primarily focuses on youth/school and the growing pains associated with that time period of our lives, I think you would be hard pressed to find a better one than this one.