This is a superior film with brilliant set design and costuming. From the sterility of the Hospital (known only as "Babel" from the subtly placed and nearly invisible emblems), to the mind-numbing anonymity of the staff uniforms, few films are as well dressed as this. Only the dissenting staff, Dr's Ross and Manon, show any hint of individuality in their work apparel. Ironically it is Benson the patient, supposedly insane, who displays the most humanity of all, with the possible exception of Dr. Ross. Segal was brilliant, and severely under-utilized in the film. Perhaps the filmmakers thought it necessary to de-emphasize Benson, in order to illustrate the dehumanization of the hospital and its staff. But a bit more contrast could have been provided IMO. Still, the film is excellent nonetheless.
Today's audiences however, with their short attention spans, will likely be permanently disappointed. To those who complain that this film is "slow" (and they are legion); I would say to either learn some patience, or simply avoid the film and go back to watching action/adventure.
While made in the early 1970's, it is highly relevant to today's world as well. Replace the "wires in the brain" with today's over-prescribed Ritalin, SSRI's, and other similar drugs, and you will see the point.
This is an excellent movie which deserves to be on DVD, with commentary by Crichton, Hodges and/or Segal. They are all still with us as of 4/2008 (Sadly Ms. Hackett is not). The sooner the better.