I think APB is a very awesome game. Concept is great, I like the ideas (even the payment method, more later).
Environment
Finally a game where you can go "everywhere". When someone is chasing you, you can just get out of the car and vanish into the maze under the freeway or in some backyards, running around corners or hide in the shopping center.
Even chasing is fine, since you have to think where you have to go to eventually cut off your targets...