They were some good sci-fi movies back in the seventies, that made you think about the human condition. Unlike most of todays sci-fi which are all about special effects and not much in the way of a story.
I liked this movie along with The Terminal Man (using science to reform violent criminals), The Andromeda Strain (a super virus vs scientist's). The Stepford Wives (replace wifey with an obedient android) The sequel to Westworld was Futurewold, just FYI.