OH MAN, this game is simply amazing
As far as gameplay, its everything you expect from a GTA game. We have the cars, we have the fights. there is a new cover system which is pretty cool. the story seems good so far, i've heard that it gets really intense by the end. The characters feel believable and likeable/hateable. That adds to the greatness of this game.
I havent gotten a chance to check out the multiplayer component, which i will do tommorow, but the premise there is that you can play with many people and cause as much havoc as you can in a single player game, except now you can kill each other :). Just the fact that they managed to make a multiplayer component for a game that is a 10/10 as it stands, just goes to show how epic of a game this is.
I give this game a 10/10, its absolutely perfect.