If you have never played this game before, pick it up NOW!!! I bought the Playstation 2 version shortly after it came out, and I was blown away. The story is deep and involving, the dialogue is well-written...everything about this game is top-notch. Jade is one of the most "real" video game heroines I have played as in a long time, and I still have yet to meet another like her. Hyllis is a beautiful place to explore, and the gameplay offers great variety: stealth, combat, racing, and more will keep you on your toes. I can't speak for the PC control scheme, but if it is anything like the PS2 version, it should be very easy to learn and utilize to the fullest.
I love this game; through the characters and the story, I was emotionally invested from the opening cutscene to the final credits. And now that this game is available here, you have no excuse not to get it.