This film is way ahead of its time. People who liked the film are the ones who really appreciate the technical aspects of the film, I mean if anyone can pull out such a complex concept into a movie there's only one man who could do it and that's Chris Nolan. It will be such a cult.
Here are the things I loved about it :
1) The writing of it was so so intelligent and mind-bending.
2) The cinematography and editing was completely flawless. Even when you don't understand the film you will love the epicness of it.
3) The performances were really good, tbh I don't really care about all character's backstory except for Andrei Sator's. So far, so good.
Here are the things I will complain about :
1) Very less explaination of the scientific concept used in the film. I mean, you can't expect audience to be curious enough to research about the concept rather it should be the part of story-telling.
2) The story-telling was not really upto the mark and the plot was kind of weak. Kenneth Branagh's performance was just average.
3) The music was underwhelming. I mean, if more bassy music was added in the final battle and tallinn chase , then it would have been a cherry on cake and would have been an excellent treat.
But by no means the film falls apart. You won't regret watching it in theaters.