I really enjoyed this drama, there's a ton of other reviews and loads of people have already said why it's such an amazing drama so I'll just take this opportunity to say there were a few problematic issues but they really didn't overshadow the good vibe that was the overall tone of the story.
Things I wish were different:

The FL actress lacked kissing experience and it showed, her kisses never got any better. Her first kiss looked like a real first kiss, but by the third or fourth one she should have been responding and moving her lips too or at least puckering them a little ffs.

There were WAY too many mentions of weight, eating too much, being fat ect. NONE of the characters had a spare ounce on their bodies.

The overwhelming attention paid to people's physical beauty. Our FL and ML both had good personalities that would have made them wonderful partners even if they looked average or unattractive, but somehow because they were both the MOST beautiful people in the world apparently, everyone would stop to tell them how good looking they were. That's a little weird.

Several times various characters would belittle someone for not being pretty "enough" though who gets to determine that is random consensus?

There were several problematic mean girl characters who never really faced any consequences for their behavior, they were promptly ignored and forgotten by the leads (as they should be) but they also should have paid the price for their bad behaviors and they never really got called to account for that.

Despite these 4-5 things, EVERYTHING else was amazing about this drama. Relationship free of drama, best friends that stick through thick and thin, intelligent and fun? Check, check, check, and CHECK! Amazing show. Absolutely watch it if you haven't yet.