I played it on Xbox before and just bought the collectors edition off Steam today.
I personally like the game, it's story, it's setting, and it's music (Children of the Elder God!)
I love how the game sets such a cotrast between light and dark, which is made even better on the PC version.
The Collector's Editon came with the 2 DLC that I would have normally never gotten because id have to deal with *shudder* Microsoft Points. And I'm realy hoping we see American Nightmare for PC soon.