For a licensed game owned by the WB this game is shockingly good. I got it purely for a laugh, to see just how bad it was. I was so suprised that i've been sneaking quick races in at work. I would say that it's a cross between wipeout 2097 and mario kart. The Tracks are very big with a few different paths in places as well as some massive stunt jumps that let you pull upwards of 720% flips and twists.
There are a few problems with occasional lagg and a few places that can be exploited to gain masses of points (which i don't think was intentional). Unlocking stuffs is abit of a grind and drifting is pretty hard to get the hang of meaning you'll spend alot of your first few races scraping across barriers on corners.
It's £17.99 and it's far better than most of the games in that price bracket for the DS.