As a racing game, Cars isn't bad, but its real strength is in its presentation. It's not quite as sharp as the film, but the cars are expressive and well-animated to the point where their chrome lips actually sync up well with the dialogue. (They also like to mug at the camera a lot during the cinemas.) Also, in what might be a first for a licensed game, all of the film's A-list actors - from Owen Wilson to John Ratzenberger - recorded original dialogue for the game. It's pretty cool, although we could have done without hearing Wilson say "Ka-chow!" every five minutes.
The movie's soundtrack is fully represented as well, and you're given full control over which tracks play during which events. Which is great, because you can only listen to "Free Ride" so many times before it gets lodged in your skull forever.