One of the most talked about parts of the new Gta is the gunplay system. You pop in and pop out of cover at will, and can even blind fire. You can now free aim, but this is sort of finicky as it requires you to half pull the trigger. This as stupid as it sounds, and I think it would have been better off as a toggle option somewhere in the menu or something. Combat is pretty thrilling , but the police chases are really the highlight here. Its now radius based, so you might need to get a qaurter mile away from a cop before they stop chasing you. You can't kill them either, as all that does is raise your wanted level.
The driving is very good, but its all to clear these are not sports cars. Just jacking the first one you see will often get a ride that simply does not want to turn using a powerslide. At higher speeds they bounce along realistically, and will occasionally flip over. There's no "press rb to flip" option, so your pretty much hosed once they flip. The cars also take damage realistically and wont just explode out of the blue. You can shoot out of the car to, which is pretty cool.