Mirror's Edge is one of the few parkour/free run focused games out there. Not only that, but it's an action-adventure game that is ethereal, vibrant and beautiful in almost every way.
The art direction is vibrant and it works well with the overall atmosphere of the game which is relaxing, intense and grimy.
The gameplay, once you get the hang of the control scheme, is flawed but intriguing. The mechanics require a bit of time to master, but once you do it's a fluent game - for the most part. But there are rougher and unpolished elements of the game that do make it a slightly frustrating experience - especially when certain missions force you to utilize these unpolished aspects.
The story here, while not the best or most fleshed out, contains an interesting premise and plot within an interesting world of characters and organizations. It's like an original comic book story come to life - appropriate, since Mirror's Edge comic issues were released alongside the game. The tone of the story is serious, but soulful. The characterization throughout the story is brief, but relevant and the overall storytelling is compelling and well-paced.
Mirror's Edge is a game that you need to get used to in terms of its presentation, but it is a beautiful game that provides an interactive experience like no other. It's got a dreamy atmosphere, flawed yet thrilling gameplay and an interesting but very streamlined story.