I rented this game for my son and when he tried to play it would freeze up. This happened multiple times and was never able to load fully. He never got to play a single game. it may have been the condition of the disc but when i looked it was not that bad at all. this leads me to believe that its a problem with the game and there will most certainly not be any patch to fix it.
I'm a self proclaimed achievement addict, so I play a lot of games. But I don't think I've ever popped in a game and not been able to tell if I was playing the original or the sequel. There are more changes in Madden every year than there were in this sequel to the original.
In all fairness, there are some new mini games (some of which were better than the original) and some changes to the overall story. But in all honestly, this is a cheap cash-in to make a few more dollars on a popular franchise. The first game sold great on most systems, so let's do it again.
The gameplay is fairly fun overall. The races are pretty easy - I'd imagine even for kids. The biggest challenge can be found in the somewhat recycled minigames. The game is short with little replay value. There are many better games for kids in all respects: Bee Movie, Simpsons, Meet The Robinsons to name a few.
All that said, I mainly wrote the review to warn owners of the first Cars game to beware of this title. If your child already owns Cars, you could delete the save file and start over. It would practically be the same thing as renting or purchasing this game. Only Cars newcomers or achievement addicts should bother with Cars Mater-National.