It was great, right up until the last episode which fell so flat it retroactively ruined the rest. Like the climax of the series is what? One main character getting to play second fiddle to the worst people in the show, the other main characters getting to go "oh that was cool huh" and that was it, time for a timeskip montage that gives each of them some little extremely individual moment of further character growth. Kano and Mahiru's arc just sort of fizzled out without any sort of acknowledgement, and then it was over.
Damn, I really hate when my cynicism get vindicated. I feel like that's even worse than the disappointment with how badly it ended, just knowing that I shouldn't have been right to be cynical, but I was.