A great adaptation of the Groundhogs day premise - repeat a day over and over again - in the sci-fi action movie genre. Cruise and Blunt are excellent here. Propulsive plot and action. It pulls off the impressive feat of not overdoing the repeated scenes Cruise's character experiences; often by letting the audience fill-in-the blanks of what he has already tried.
Only negative is the climatic sequence: it occurs at night and is hard to see & follow as a result.