Watch it twice I couldn't wait to watch this movie, however, after watching it the first time, I was a bit confused about some of its parts, so the movie as a whole didn't clicked with me right. Nevertheless, I was able to get the bigger picture and the action scenes and the effects were done amazingly. So, I actually did enjoy it on my first watch, but still I thought that some parts were missing. That's probably because I didn't expect such a complicated movie and when I realized it, it was kind of too late. And the fact that Tenet hits the ground running from the get-go didn't help.
But, here comes the interesting part.
Something told me to wait some time and give it a second shot. So, I did, and after the second watch the movie made sense and my mind was blown. It's not perfect, but it's still a great movie.
With all that said, I highly recommend watching it a second time.