Time shift for the box 360 is a great idea. But that's the thing its a great idea but it doesn't follow through think of it as the colorado rockies. The time powers were fun but the story or lac of ruined the game for me. I say rent it if the shipping doesn't take long and if your so bored with your life that you would acutely consider get anything less than a 7.5 rating.
This is a good game and well worth renting assuming you like FPS. DO NOT BUY THIS GAME, although i like the game it has no replay value, after a week or so you will be done with this game and want to send it back. All in all, the timeshift ability is pretty cool and the game has great graphics. i recommend renting it but i warn you not to buy this game