To be honest this game sucks!
I enjoyed the psychic powers on this game but i only played it so i could be an arsonist. To be honest i would say this game isnt worth buying but if you can find a demo of the training then you should get that.
I don't really like the story line i think a lot more effort could have been put into it but besides its ok i guess but i wouldn't advise you to buy it especially on the PS2.
I haven't played it on the other platforms but i seriously doubt there would be much of a difference in the game play. I believe that this game has been given a higher mark then it should have got, it is overrated.
I will finish with this: Don't buy this game!