It's epic. It's an inspiring masterpiece!
The feelings when you watch it are very complicated. You feel attracted and astonished by the strange outer space, but at the sametime, you feel a little bit scared, panic about the unknown space. You feel small. You feel respectful. But still afraid. The soundtracks express the feelings very well.
When you finish watching, you feel you just see the tip of the iceberg and want to watch it again.
Can't believe it's a work done in 1968.