Who read Brave New World help me please: Toward the end of the book

Toward the end of the book, the Controller Mustapha Mond sums up the benefits of living in the “brave new world” Utopia: “The world’s stable now. People are happy; they get what they want, and they never want what they can’t get.” It sounds like perfection, and yet the world Mond describes is deeply, intentionally horrifying. Why? What exactly is so bad about this society of the future? Is there anything good about it, anything we could learn from and try to adapt to our own uses?