I love it when filmmakers set a difficult challenge for themselves in terms of producing the desired effect and response for the audience and succeed in meeting that challenge. When you see them succeeding, that alone is enough to put a smile on your face. In this case, as the premise of it takes shape you don't just wonder how the story will turn out but, perhaps even more, how the filmmakers are going to keep it interesting, keep the necessary repetition from becoming tedious. I thought director Liman and stars Cruise and Blunt pulled this one off beautifully. Yes, the ending wasn't steel trap logical within the world it had created but I don't think that is possible in these loop-de-loop time travel movies. In fact, there were holes in the "logic" of it throughout. But the style and fun of the movie, the performances by its stars, particularly Cruise imo, won the day.
On Cruise, he may not disappear into a character the way others of his generation can. You can almost always see Cruise, the filmmaker, making an acting choice as a matter of effective story-telling rather than as a matter of emotional inevitability. But that's not such a bad thing in this era. The guy has star quality to spare and, as an avid movie fan himself, a keen knowledge of what would and would not work best for the audience in a given scene. I wouldn't be surprised by some Oscar nomination buzz for him in this one. I know it is a rarity for that kind of buzz for an acting performance in this genre. But he really didn't flag or disappoint for a single frame of this movie, and it clearly was not an easy lift.