If you're really keen on minigames and destruction derby, it's probably still worth checking this out. The controls affect those games a little bit but it's no where near as soul destroying as when trying to win a race. Technically the title is extremely impressive too, so if you're looking for a title to sell PSPs to your friends, this might do it.
The only other reason to recommend this title is for those of you out there with classic "phatty" PSPs, who are looking for a reason to buy a new slim PSP: when your existing PSP stops working because you threw it at a wall while playing Flatout, you'll have your reason. Just don't play it anymore after that.