I enjoyed it, is like a Grand Theft auto style game. The cool thing is that as you level up you gain super strength, super speed and super jumping ability. Once you level up enough you can reach the highest building in the city. Your the law in the city.
LOVE IT It's not as ridiculous as Prototype 2 (where you can run up a building while carrying a car) and it gets funny when the Sha-gen are on the rooftops shouting "TIME TO DIE!!!"