Its pretty darn good, for me the only issue is the pacing, sometimes is hard to grasp the situations happening and the continuity of events and in others things are happening randmly.
I felt the last volume somewhat rushed and lacking coesion(?idk how to write), manly the last 5 chapters with many revelations and plots twists that have just little time to integrate with the work, leaving a feeling of frustation.
This could be an amazing work at least 9/10, but with all this issues it is 8/10 streeching because I am parcial and loved the history