While it's not perfect, there are far worse games out there.
User Rating: 7.5 | Mirror's Edge PS3
In my opinion, Mirror's Edge is worth checking out if only for the very unique first person free running game play. After having played the demo, I was really looking forward to getting the real game. Unfortunately, it's a bit of a letdown in some respects. The constant trial and error is what did it for me. I would be breezing along, take a mis-step and fall off the side of a building, get hit by a train or get killed by a sniper, and have to go back a good few minutes. The sections that are actually outside are great, though and I really loved the visual design. It's a nice change of pace to see a game with such stark, crisp graphics, as opposed to the usual grey, brown, or green of most games. And it may be a small thing, but I really love the theme song "Still Alive".
So, in short, I would probably recommend it, if you can stand a fair amount of trial and error. It's an original concept with very nice art, sound effects and music.