It's fun I already watched 20 episodes in 2 days but what i didn't like here is that guns coming out of nowhere and the strange characters and teams. One, Rui Habashira, is like a snake? frog? reminded me the character from Yowamushi Pedal, Midousuji Akira. How can you even talk with your tongue out??!
Let's no forget Kuroko Tetsuya kind of character there either. He wasn't so much active till now but I wonder if it will have more screen time later: Tetsuo Ishimaru.