I was really shocked how well this game actually performs! I think the physics are better in some ways than that of GT4. The graphics seem a little brighter than GT4 as well. Here's the review:
GRAPHICS: The 200 cars that are available are modeled very well. The sense of speed is also really good. The backgrounds could have used a little more work. The colours trackside seem brighter (maybe even a bit cartoony), but don't detract from the overall experince.
SOUND: As with most racing games the engines sound like a hive of angry bees. I have never driven a suped up Nissan Skyline or an Acura NSX, so I really don't know if the engine sounds are authentic. I do know that the music is pretty annoying and you'll most likely turn it off after an hour or so. The ambient sounds trackside are slim to none.
CONTROL: Here's where this game shines! The VGS systems (in my opinion) enhances the overall experience of this title. Not only does it illustrate how much rubber you have slipping when enter/exiting a turn, but it also shows you the lateral G's your car is experiencing is a grapical way. This system I feel simulates the way a car would react in real life. Having driven a car, I know this to be fact. There's definately a rhythm to this game when it comes to steering.
OVERALL: This is a solid title that is definately worth a purchase. Since this game can be had for roughly $20, it's a bargin at that.