There are metric tons of cinematic filler in this movie, which makes me not want to like it. But the story itself kept me watching. You might need to watch this movie more than once or twice to understand everything about it. HAL is regarded a scary character or representation of AI, but do you not see it is what sentience is? Being scared to die.
It's a movie that hasn't aged well if you aren't used to older movies, like myself. But the premise of the plot is very interesting if you're willing to put in the effort to think about it.