If you were a fan of movies like if you were a fan of Inception, you'll love this movie. It has a nonstop, constantly flowing movie plot that will get your mind more than occupied on what is going on. The theory behind inversion is well laid out, there don't seem to be any "scientific potholes" or made-up stuff (aside from this being a movie about reversing the entirety of the entropy of an object.
Two downsides to the movie and why I don't think it deserves a perfect 5 star: Sound mixing and plot explanation
I'll start with the plot explanation, as it relates to the sound mixing
This plot was very confusing, and complicated. That isn't necessarily a bad thing, because as long as the entirety of the general plot is explained, it makes the viewer appreciate the film more (I say "general plot" because Nolan tends to want his viewers to fill in the rest after finishing the movie, and usually I'm fine with it, it gives the film more texture). But In Tenet, Nolan knew that this plot was far more complicated than any other sci-fi/mystery movie of its kind. And he also knew he had a lot of explaining to do, speaking about both the timeline and the science of the movie.
But I think that Nolan could have done a much better job at making room for plot explanation in the film. What I think happened is that Nolan put way more energy into the action scenes. And yeah, they were pretty amazing, but they would have been much more amazing if we had a better idea of why we're at where we're at, who's shooting who, and why. (I went through quite a bit of "timeline explained videos" on YouTube, because you have to be both Albert Einstein and Sherlock Holmes to understand the movie in one go, especially your first time watching) (But I will also say that the action scenes are at least enjoyable to the point that they temporarily cover up your confusion as you watch them)
Now for Sound Mixing.
As I already explained, Tenet's plot is very, very dense. And I've also mentioned how I didn't think Nolan put enough effort into explaining the story to the viewers. But the volume levels of the speaking, especially while listening to the soundtrack, did not help one bit. If you like to crank the volume to 11 when you watch your movies, this is a great selection. But if you're not looking to have too loud of a movie, then there are some concerns. Especially during talking portions. The speaking by itself is decent, even over gunshots and explosions. But when the soundtrack came on, it just washed out the sound of the actors.
The plot was already confusing enough, but I enjoyed the mystery.The primary motive for the star deduction was because the audio at times was really poorly mixed, and it a lot of times washed over crucial talking scenes that addressed what was going on in the movie.
Overall, Tenet is definetly not one of those "one and done" movies. It'll get you thinking long after the end credits roll by. But poor sound mixing in conjunction with a very complicated plot stick out like a sore thumb to me. But still, a very enjoyable Christopher Nolan movie, with a stellar soundtrack by Ludwig Gorensson.