I loved the characters in the manga, they were all unique and had interesting. As for the plot it was good throughout the begining and middle but I felt that the end was a bit rushed and confusing, with random info kinda just thrown at you, and while that was a theme with the flashbacks throughout the manga it wasn't as rushed and while some of the early flashbacks didn't make scense in some parts at first it did still work since the readers were learning with teito as he gained his memories, and with the info later continued in the story. But because the big fight and conclusion were only in the final couple chapters everything got wrapped up to quickly, with some parts of the main character's backstory or the side character's info feeling like it just got jammed in as an after thought to quickly explain something. (akanami's past, and who of akanami's subordanates survived, ect.)
So over all a good overall manga that is brought down a bit by a to abrupt ending.