I had the original of Cars for the DS and it was solid but a big waste, the game was just cut up into mini games which even though were for kids wasnt paticualarly easy.
Cars Mater-National on the other hand is just what i wanted from a games based on the brilliant film, its actually just a racing game and even though it is missing a few important characters most of them are there.
The driving is brilliant, although pretty slow the cars slide very easy and you have a cool turbo function which can be upgraded. The games also features challenges like trophy hunt were you have to get all the trophies on the track in the time limit and elimination and time trial.
The game also features interactive tracks with short cuts. and even the voices of the cars are used while racing.
If you are a fan of the film buy this you won't be dissapointed.