Awesome new IP by Platinum Games. I would classify this game as an action adventure with RPG elements. You play as a police officer whom has the ability to control "Legions" which are your battle companions. You spend half the time doing police work (finding clues and completing main and side quests) and the other half fighting enemies, mini-bosses, and bosses.
The police station is a main hub where you can heal up, upgrade equipment and your Legion's abilities, and start new mission. So, you spend quite a bit of time in there. The missions are in different regions of the city and another dimension.
Gameplay is very straight forward, you have a case, you need to find clues to solve the case, you engage in battle with enemies. There are quite a few twists along the story that keeps the game fresh.
Art style is very anime like. It does look really good on handheld and when docked.
Performance is good, with very few drops in frame rate when on the most demanding action sequences. For the most part it feels really smooth.