I have a 5-year old boy who absolutely loves everything related in any way to Lightning McQueen. This was his "main present" for Christmas 2009, and I'm so sorry I bothered with it at all. It was expensive, it's flimsy, the batteries don't last long, the rubber belt is only designed to fit the standard original release die-cast cars, (so anyone with a smaller set of cars, like cars miniatures, won't be able to use them on this). The track itself is ugly, it's complicated enough to piece together - there's no way my 5-year-old could put it together.
All in all, a huge disappointment from what is usually a reliable brand, and a complete waste of money - I think he's played with it twice.
For anyone who's looking for a hard-wearing, durable, large racetrack suitable for play with any cars, I'd recommend checking out the Roary the RaceCar Race Track.