It's not that Herbie is a bad game; it's just way too simple and way too short to hold your interest, and your money could be better spent on any of several other GBA games out there, racing or otherwise.
The smooth 3D graphics are the game's lone bright spot. Otherwise, the driving is too basic, the AI is too dumb, and there are barely enough tracks and play options to occupy more than an hour of someone's time.
A subpar racing game. I had a somewhat fun time blazing through Story Mode, but with a lack of tracks, no real reason to play the other modes, and the fact that you'll get bored of it in less than an hour, it's hard to recommend this game.