It's been out a while, but I heard some good stuff about it and it looked similar to portal which I loved to bought this too. It's so nice to look at.

Portal was the same graphically. With the base colour for all buildings and surfaces as greyscale with certain objects and surfaces a strong bright vibrant colour. It works so well and the textures couldn't get much simpler tbh. They haven't paid great attention to detail in texturing which is what makes it so sexy. There's no little grainy surfaces, small markings or anything to spoil to sex of a nice smooth colour.
Seriously, I could look at this for more than I could with Crysis Warhead or anything else realistically smexy. Don't get me wrong, Crysis is the best graphical game in terms of realism I've ever played and it's effects are top of the top. But Mirror's Edge has some quality about it which just makes my insides tickle.
I get the same feeling with certain web designs too, I just "jizz in mai pants" when I see something so simple yet so sexy. Simple IS sexy.