2001 is a milestone in special effects/ What Kubrick did in 1968 set the standard for a lot of people who made movies later.I downloaded in HD but could not bear it... for first 20 mins that apes and another 20 min..well I don't remember but that was damn slow, at last I pressed shift+Del
Hope I have not missed something
I must confess it is not everyone's cup of tea. If you can bear it, then it is a great classic science fiction movie. I liked it a lot when I saw it first, but watching it again was painfully tough. Heck, you could use that movie as a screensaver for your computer (which is what Windows 98 did, the space screensaver did have 2001: A Space Odyssey's elements).
I recommend you watch 2010: The Year We Made Contact. It is the sequel of 2001. And much faster as well.