If you havent read the manga or watched the anime it might seem kinda fast and the characters might be kinda confusing at times. The manga ran for 30 Volumes and 123 chapters and even the anime had 36 episodes but only went to chapter 47 so 12 episodes at 30 minutes a piece doesnt really do the story justice. If they would have made the episodes longer and added more from the manga I think it would have been perfect.
At the end of the day it is a live adaptation of an anime so it can be pretty hard to nail certain characters and how they act in certain scenes. I feel like its a double edged sword. Either you follow the character to a T and the acting is a little awkward at times or you have to change the character a bit and potentially more to fit how real world people act which I feel like can be tough. I do feel like they had a good mix of both in this and were able to portray the characters how they were portrayed in the manga/anime pretty good.
All in all, I feel like they did a really good job with this show and the actors fit the character pretty well. Wish certain scenes that were pretty big in the manga/anime were also included in this but oh well.
Loved the show!