So firstly overall, the drama isn't bad. I didn't go into the drama thinking it was going to be extremely accurate. So I'm going to talk about it as fiction rather than as history although there was history thrown in (of course).

What I liked about the drama:

-The friendships in this drama were pretty compelling. I found myself smiling a whole lot at how genuine it felt.
-I enjoyed Park Seo Joon's character. He was like an underdog and that made me root for him even more. I found his storyline a lot more interesting than Ji Dwi's story. Just based off of how they did it.

What I didn't like about this drama:

-The love triangle was awful and in my opinion it was gross and uncomfortable. This might be a spoiler so you might want to go on to the next bullet... but... I felt as if Ji Dwi forced himself onto Ah Ro (more emotionally than physically) which made me uncomfortable. I don't understand how I was supposed to like his character when they literally wrote that in for him.
-Ji Dwi had protentional but the love triangle made him look bad and he started acting sus at some point.
-The flashbacks happen way too much in this drama. I skipped so many because it was like "I GET IT!!!!" It felt like I was being reminded every couple of minutes.
-The drama should have focused more on the friendships and other people's stories rather than the love triangle. It wasted time.

The drama overall was good. At some point I was brought to tears but there are certain bits about it that almost made it unbearable to watch at the same time.