The game is more linear than Driver, but it has a much better gradation of difficulty than Driver, as well. It starts out easy and gets harder until the last mission is very difficult, unlike Driver where some in the middle were next to impossible and had to be circumvented by going through an alternate plot line.
Multiplayer is fine, you can have fun with it, but it's not really a type of game play that lends itself to multiplayer.
The voice acting is good, Tanner and Jones do great together, the cut scenes are less confusing than the original Driver.
You can now steal cars. You still can't run over pedestrians or shoot, this is not Grand Theft Auto, the focus is on driving, and in that it succeeds. The locations are better than Driver, the cities are more open, Chicago in the game is the Chicago I remember from having been there, and it's interesting to drive around in Las Vegas (although all the missions are in daylight so it doesn't feel like THE Las Vegas) and Havana. Despite the other user's comments, I found less glitches in this than Driver, although I played the Playstation version where bugs are generally less common because you don't have to make it work with hundreds of video cards and half a dozen CPUs on three different operating systems, all at varying speeds.
You can drive some bigger cars including school buses and trucks, and there is actually a helicopter though not in the story portion of the game. It probably represents the limit of what you can do with a driving game on the Playstation hardware. Most definitely worth picking up if you are a fan of city driving games (as opposed to closed course racing games).