I really love Arslan Senki, since it was my first Anime and also my first Manga. Now that I have reread and caught up with it, I can't wait for the story to continue. This series will always have a special place in my heart, so I might not be competely objective, but I strongly advise you to check it out. Story The story is great! The actions of the characters, always feel like they do, what they would do in their situation and it rarely feels like something happens just for the plot. There are some fantasy elements, which I honestly think the series would bebetter off without, but they don't ruin the story for me.

Characters
Every character is a person and acts independent from another, they have their own targets and work towards those and sometimes their interrest clashes with the one of someone else. Silver Mask is also a great antagonist, with believable motives and is someone who is genuinly menancing, as he is able to hold is own in an sword fight with two of the best sword fighters in the country and he isn't dumb either. Another positive is Alfreed whose setup, would make her an annoying brat, but she is actually one of the most likeable characters in the series. Espacially her chemistry with Elam is great.
But, I have to crititcise something, aswell: most characters feel very stagnant. The character development is almost monopolized by Arslan and Etoile, which somethimes is a bit disapointing.

Art
Hiromu Arakawa has made the art, which is basically everything you need to know. Admittingly the first few chapters are a bit of a let-down, but the Art gets better and better as the series progresses.

Finally, I can only apologize for any mistakes, as english isn't my first language and tell you that you should defenitly read Arslan Senki!
Thank you for reading