Interesting concept, but very confusing presentation. I’m usually a pretty sharp viewer, but with Tenet I had an extremely hard time grasping what was happening until the last 30 minutes (and the film was about 30 minutes too long). Also, the sound mixing was awful. At some points you couldn’t tell what the actors were saying (might have contributed to my confusion). The action scenes when everything was inverted were impressive, but that’s about it.