had this a few days ago and i can tell you that it is awesome, even better than GTA IV, theres so many improvements and they've added more side missions(missions that has nothing to do with the storyline and can repeated) i remember in GTA IV i even searched the net for fun things to do because i can't think of any fun things to do anymore, few locations, boring dates/activities, assassination missions that can't be repeated and not generic. plus the collision system was too sensitive, you were just bumped slighty by a car you would end up being a drunk man trying to keep his legs standing.
NOW Can't wait for a Next Full GTA game.