I'm a little upset about the surprise enemy in the facility that shows up after you open the door by having the correct switches on. I would have saved my game had I known there would be an enemy that would 1-shot each of players.
The only thing that bugs me is when my character counters the last enemy of a wave and kills him, then the entire next wave gets to pummel me for free. No reason to give it less stars for that, though. Still 5/5 game.
I think I've decided to quit after the last boss got to use the ice attack which slowed all my characters down, followed by an immediate turn of KOing each player after that. Really great game, but I don't want to farm for sp anymore..