Playing with some very cool ideas here, and you can easily see why it was so respected for its time. However, the Spielbergian formula is not necessarily elevating this movie, especially when it comes to occasional reliance on special effects action instead of focusing on the great story.
Fantastic premise from a Philip K. Dick story and a excellent try at a serious thoughtful science fiction. Delicious production design and effects. Few people make good and engaging action sequences as Steven Spielberg. Only the obvious final "surprise ending" with a traitor in the midst disappoints and ruins an otherwise fantastic movie.