I liked the world a lot. The different augmented humans were interesting. The world felt lived in, yet the greater world lacked a lot of details. Concepts of government or geopolitical structures are vague at best. That makes sense though, Mars isn't concerned with the universe around her, nor its denizens. She's focused on revenge. However the lack of depth becomes apparent when I don't care for the characters. They all display little to no interesting personality characteristics other than they look cool. There are vague allusions to more, but never enough to make me interested. The action is great; bloody and violent, it comes alive in those moments. Mars is very similar to X23. Not in that she has adamantium claws, but based on the fact she's a character that was experimented on by a shady organization to become a weapon and everyone she was ever close to died. The biggest problem with the story is that it's too vague. There were moments where I had to reread what happened because it felt like I missed something. It's the opposite of an info dump, in that instead of divulging exposition actions, character motivations, world design, they're all conveyed with sparse details. At the very least, being 1st person narrative I should have felt inside Mars's head, and viewed the world through her eyes. As stated earlier, it's possible her character is unconcerned with the world around her thus the lack of information being conveyed, but it didn't work for me. If you want a female super-soldier kicking ass adventure with a vibrant world, check out Clary Caffrey's Girls from Alcyone series.