Yeah i bought it out here yesterday. good game so far. certainly not as detailed as Gt4, but i think that is better in certain ways. cars are pretty accurate, having the MSP in there kicks ASS!!111!!1
Autocross mode is fantastic, and career mode is more structured than GT4 (i like this, IMHO).
As far as handling, i have not used it with a wheel yet, but the gameplay controls are pretty good and car tunability is just as goood as GT4. Starting the game is a lot more fast paced from the start (no licensing, etc.) so i liked that.
Graphics are geared more towards NFS2 as far as setting/design/brightness, as opposed to GT4 graphics (real, standard, some say plain).
Overall, its a great game through the first 6 hours or so. I like GT4 slightly better for the only fact that there are more cars and a wider range of tasks. Still a great game though.
I am not sure if they made 2 versions of this game like they did GT4, i assume not, but in case they do, i am playing the chinese version, so it could be different thatn what you get.