I know a lot of people have reviewed this game with relatively low marks, which I am struggling to understand why. Yes there is no free roam, but the career mode is excellent. I think the graphics on NFS Carbon for the PSP were better, but the game play is certainly more challenging. It took me about four weeks to complete this game, whereas I'd completed Carbon in under a week.
If you're looking for free roam and easy game play then this isn't the game for you. If you're looking for excellent game play that's a real challenge then go and buy it!!