I couldn't believe the perfection of this movie. It's so tightly made that nothing is superfluous in its entire run. The dialogs are perfect, witty, sharp, funny; the main idea for the script is superb (to invent a product that defies obsolescence is a No-No in contemporary industry) and the actors are absolute perfection thanks to their own art plus a firm and secure direction by Alexander Mackendrick.
I didn't find Alec Guinness role particularly funny but I found the Elderly Industry Boss (Ernest Thesiger from legendary "The Bride of Frankestein") simply a scream. Every scene he's in, he steals it completely, nobody else exists on the screen. What an actor!
Joan Greenwood was the kind of personality that we only see once in a century. Her voice and delivery are something impossible to duplicate and thoroughly unique. The only wrong thing with her in this movie was her hairdo. Did she comb it herself without looking in a mirror before the first day of shooting and never again till they were through filming? Did she get a hairdressing student rejected by the beauty school? Her hairdo is too dreary to be unintentional.
A fantastic movie, entertaining from beginning to end, with a very clever twist impossible to predict and resolved precisely at the right moment and by a perfectly acceptable chemical explanation. A film that only the British could have made with their sensational Black Humor that nobody else can imitate. You'll find the look of this movie quite old fashioned, but having been made in 1951 we cannot expect anything different right? forget about its looks, sit down, watch it and you'll be thrilled to have discovered this precious jewel of a film.