Yes, definitely. Like Devin, it's easily in my top 5 comedies all time.
One note for Amy on that story about Willy Wonka and snozzberries: It's not quite an urban myth - Dahl did use the word to mean penis - but it's not quite what it's often made out to be either. Dahl wrote that in the book My Uncle Oswald in 1979, well after Charlie and the Chocolate Factory and probably more importantly well after the Willy Wonka movie. Maybe he had that meaning in his head when he wrote Charlie, but I think it was more likely a reaction to the success of the movie, which he didn't like much, and how often he was probably asked what a snozzberry was. I always took it as his way of thumbing his nose at the film. Of course that's just my guess