I'm really considering buying this game, would say it's worth it? It's been so long since it's release, it might be too dated by now, but it looks so good.

I have also been really wanting to pick this up.  The same team made Shadow of the Colossus and I picked that up and absolutely love it, so if that is any indication I think ICO will be equally enjoyable.

The graphics, though the design is beautiful, will look somewhat dated, of course. This game is from the early stages of the ps2. But even if you're someone that cares a lot about graphics I don't think it'll get on the way. As I said, the design is just too pretty to be ignored, and the gameplay is great. Not to mention how immersive it can be. You really miss the girl when she's not near you. If you can get your hands on it, I wouldn't think twice about it.