When I first got this game I originally thought it was like GT5 with better graphics, more cars, more tracks, less loading times, nice. And then after playing it for 2 days I saw I had completed 50% of the game. What! I've had GT5 for about 2 years and I'm still not at 50%. The physics are worse than GT5 as well. It's way too hard to keep a car on the track, so much so that I gave up in frustration several times. It feels like your hovering above the road, it's hard to explain. And the audio sucks. One other game I can think of that has worse audio is Pole Position. Remember that one? So the moral of the story is this game is a good rent. Play it for a couple weeks, get bored with it, send it back and wait for GT7.
If you love sim racing games this is a good game. There's not much more to the game it's a pritty game but I actually like the look of gt5 better it just had more style and the look of this one just ads to its run of the mill sim racerness.