Ethan M’s review published on Letterboxd:
One of my all time favorites. This film is absolutely teeming with detail, which is exactly what I'd expect from perfectionist Stanley Kubrick. The sci-fi is so accurate and grounded, which is thanks in part to the astronomers they got as consultants, as well as the amazing sci-fi author Arthur C. Clarke (seriously, if you haven't read any of Clarke's sci-fi novels, please do yourself a favor and check him out).
Fun fact: the novel of the same name written by Clarke was made at the same time as the film, not after the fact. Clarke wanted to explain the science of the monolith and go into detail about the world of 2001, whereas Kubrick wanted to leave the monolith up to interpretation. Both portrayals have their merits, and I don't think either method of telling this story is better than the other. In fact, I think they made the right call doing their own thing. Clarke's methods work best for novels, whereas Kubrick's methods work best for film. It's just like that thing Hannah Montana said.
This film is a journey, full stop. If you ever get the chance to watch this in IMAX or something, please do it. I was able to watch this at IMAX myself, and it made every frame, every sound byte look and sound so immersive and real. I love this film, and it's always gonna be in my top 5 favorites.