While you can kill people in the game, it's very possible to complete it without hurting anyone, and you're encouraged not to. There's even an achievement for not killing anyone.
Pro Innovative, parkour-inspired, first-person platforming with excellent sense of motion
The game's core mechanic is about traversing levels using wall-jumps, rolls and slides without losing momentum. It does a great job of creating a fluid sense of motion that you have complete control over.
Pro Unique, minimalistic art-style
Mirror's Edge is set in a world where a totalitarian government runs a city and tries to eliminate anything that stands out, such as the free-running protagonist. The levels are created minimalistic, mostly white with aggressively contrasting primary colors, to represent the oppressive nature and sterility of the world.
Con Some people may experience motion sickness
In order to maintain its immersive nature, Mirrors Edge has virtually no UI, other than a small dot at the center of the screen. This should ward off motion sickness for most people, but be aware that if you're queasy, you might not feel too well after playing.