Good

1. Actors and the chemistry between ML and FL
2. The way they meet and bond in high school and the separation
3. Smart FL (although sometimes too soft but i can live with that)

Bad

They go to college and thats when the drama which could have been great starts wavering. Immature characters and scenes that doesnt make sense at all. Computer science competitions are no where like the way they show.( i was a computer science student and been in the industry for a decade. ) . SML is outright stupid but thats ok. ML is a good character overall but when they do fight its very immature. And some side characters annoy the heck . Be it FLs best friend who being best friends with FL cannot realise she loves ML and instead keep spouting rubbish about SML or be it ML friends who post in ML profile without ML permission to help him. And so many so many side characters who are into ML or hate FL ughh. And random scenes like some college students attacking ML bcs of a wrong accusaton doesnt make sense at all.
Also FL is shown to be hard working but there is not that much professional interest shown for her ( i am comparing this vs lighter and princess FL where FL really starts loving programming)
And also FL hiding things from ML becomes repetitive after a while. it is just way too annoying if characters dont develop and learn.
Even after all of this its a fun to watch . Just because of ML / FL chemistry and some good scenes on growth of ML and FL..

PS : i am not sure if its good to compare but i would still say this is a little immature (not great but okayish) version of lighter and princess. Bcs there characters showed growth be it communication or regrets or letting go of past. Here we dont see anything . Characters makes mistakes again and again and again!