This is a great concept, poorly executed. While the audience should bear a little patience and realize that something interesting and new gets introduced everytime the clock resets (ooo, the plot thickens!) and we see another 'vantage point', the movie was FULL of fluff footage (we saw the plaza maybe 8 times, the explosions about the same, yaddayadda).
But fine. I can deal with that, because I did enjoy how the plot was moved forward by revealing little bits about each interaction, changing your idea of whats really going on... until... (ending spoiler beware!)