Honestly speaking, despite this being pretty old and still running today, it hasn't gotten boring even in the slightest. The whole idea or premise is definitely promising and the execution of it, was definitely good despite it having a little bit of a slow start. One of the main characters, Lieutenant Malvin, has a rather hard to swallow personality to phrase it nicely. She is however, getting better as time goes on due to the learning process and development of her character, so that is a plus since I was afraid of her never getting any better. Regarding the story, I think that there is a lot that hasn't been filled in yet, but a lot has also been revealed and the fact that it hasn't run out of new things to know about, is outstanding and hard to pull off. I could say more about the other characters, but I just suggest reading it. It's one of the best manga in my opinion right now.