Helicopters for instance, how do they handle, control? Mercs 2, GTA IV, Saints Row 2, Just Cause, erm, you get the picture, which game do they most feel like?

Also, what about the armoured vehicles?

On another note, can you get/drive civilian cars as well?

I don't know what to compare it to but I found the handling of the vehicles very good.

I think the tanks and APCs are a bit janky.  The helicopters are okay.  I think ground vehicles are supposed to auto direct themselves whenever you just push up on the left analog stick, but I can't seem to make it work without pushing it left or right to turn the tank.  The thing is, that doesn't always work (seems unresponsive).  So I'm not sure if the driving is supposed to be like Mercs or Halo tanks, but it feels kind of like both.  I hope that makes some sort of sense...

Helicopters rise with A, fall with X.  You fire with RT, cycle through weapons with RB, lock on with LT, and switch targets by flicking the Right Stick whuile locked on.  You move the heli with LS but rotate with RS (when not in target lock).  I think that is similar to Mercs, but I can't remember (sans targeting system).

Overall, the vehicles are manageable, but somewhat clunky and undesirable.  You spend most of your time on foot anyways, so don't let it discourage you.

The helicopters handle awsome i love jacking them and pwning the strike teams with it , but the tank and apc i dont like much its slow and confusing at turning

The ground vehicles are somewhat weird to control, but the helicopters control pretty well. But then again vehicles aren't really the main focus of the game.

They're pretty simple, nothing fancy. Especially ground vehicles, which admittedly can be clunky and unresponsive. But who really wants to drive a tank or a chopper when you can jump fifteen feet in the air, outrun a helicopter and morph your arms into numerous fatal weapons...