I FINALLY watched the whole thing!
And if you knew the nature of my previous attempts, you'd know the reason for me starting a whole thread to announce the fact. Before voicing an opinion on the film, I'll read around this board to see if I can find an answer to what the ending meant - because I don't know what to make of it. However, I'm not one of those folks who say a movie is bad because they didn't understand it. I think I still did like it, but I'm not completely sure. lol
EDITED to add: Oops! I see someone else very recently started a similar thread. Glad I'm not alone in being probably one of a few people over a certain age who's only just now sat through a viewing of this well-known sci-fi film.