From the PlanetPSX review:
"When ModNation Racers came out for the PlayStation 3 a couple of years back, I developed a serious love/hate relationship with it. The love side involved the customization features, like building your own dream tracks and drivers and sharing them with others. The hate was the racing itself, with weapons cheaply knocking you off the road and AI drivers showing the kind of imbalance that left you wondering if something was wrong with your car. Overall, it was a good game, but with some serious flaws."