Mirror's Edge, 5 years from its PC release still looks pretty impressive, even by todays standards. The game world is gorgeous and makes me feel pretty chill (when I'm not in the midst of a fighting sequence). The controls are simple, clean and easy to grasp, and the level design is creative. I especially enjoyed how puzzles could have multiple routes to their solutions, and how the route to the end point of a level wasn't immediately obvious because of this. There is also a rather nice soundtrack to accompany the game, and it fits the environment well. The story unfolds well enough, though for me the story took the back seat to the gameplay experience. The free running style, the jumping and the problem solving involved in completing levels was very satisfying. This isn't to say it was a bad story at all, it engaged me just fine, but it was perhaps one of the less strong aspects of the game. The game wasn't particularly long, but I feel this may work in its favour. There is the risk of challenges becoming frustratingly difficult/repetitive, especially when there isn't a particularly impressive story to drive it. I feel it ended at just the right time and the ending was executed well.
Overall, I found Mirror's Edge to be a challenging, visually impressive game whose key selling point is the game mechanics. The parkour system is pretty good especially for it's time, and it just feels fun when you're running and jumping and executing the sequences. If Mirror's Edge 2 takes these elements forward and builds on them using todays technology, it should hopefully be a very good game, much like its predecessor.