See, the core gameplay loop of moment to moment traversal and exploding things is actually super fun. I had a great time on the island where you play around while the game installs. I had fun doing some of the open world as soon as I got control of my character in the main story part of the game.
But then I hit a wall where I couldn't really play around any more until I did some story missions. Those were a complete drag. They didn't have an interesting narrative and they definitely didn't have as fun gameplay as just messing around.
If there was a mode with infinite ammo and the entire world opened up for playing around in I might have actually used the keep it button and bought this one from Gamefly. But as things were the story just got in the way of my fun.