It's a real classic for sure!
And remarkably prescient about the advertisement industry culture!
And the Supreme Court is trying it's best to make the book come completely true.
I must say, though, when it comes to SF, Penguin has a real thing for dull, drab, rather ugly, and utterly boring covers.
I couldn't find an image of the cover of the 1984 Penguin which I have. It's somewhere between Giorgio De Chirico and a Maidenform bra ad!