It's hard to find anything about which to complain, though. Load times are very reasonable for the PSP, and considering how much you're likely to play this game, that's especially welcome. The soundtrack is filled with a lot of no-name bands playing nu-metal, but you can turn that off if it grates.
If you do dig that kind of thing, it's pretty good no-name nu-metal you won't mind hearing multiple times, and it fits with the game's destructive content. That's all secondary to the racing, the crashing and the driver launching, though. FlatOut: Head On is a complete package that will entertain you on the go for a long time.
Verdict: Buy it