This game is really sweet. Though I had to play in on another system that the one I rented my game for. The PS3 has a lot of issues running this game and there are no clear resolutions to address the freezing in the game. If you are going to use a PS3 I would recommend only renting if you have an very new model.
As for the game the multiple player mode and switching between characters is really cool. Taking over and having some good ol' fun GTA style is always a good time.