It's a shame. Early on TrustedReviews had Speed Racer down as one of the least cynical and most accomplished movie adaptations they had seen in years, and it was only once they found frustration in the later races and the same five environments repeating that their initial good impressions fell apart. Even given their reservations, they have no doubt that any kids who fall in love with the film and its world will get something out of the game, but they could have got so much more if only the AI wasn't so aggressive and Sidhe had been a bit more generous with tracks.
As it is, anyone with a copy of Mario Kart won't see much reason to opt for this instead. And if you're that desperate to play F-Zero, then you're better off sticking the old GX disc into your Wii.