Pros: Treeless book, mind-stretching
Cons: Some of it's depressing, not really waterproof, not a ton of actionable suggestions on an individual level
I would call Cradle to Cradle a seminal work in the world of sustainable design and in the green movement at large. McDonough and Braungart are doing some incredible things and have a great perspective on design, business, industry, waste, and living sustainably. You'll read things in there that make you say "duh" but you'll also read things that make you think "huh...that's brilliant."
One of the great parts of the book is the notion that growth, the right growth, can be great for the environment. But it's a question of how to achieve the "right" growth that nurtures and protects the environment, and does not degrade it or exploit it.
There's a good portion of the book that will depress you. I tend to refer back to McDonough's notion that "being less bad is not being good." Yes. That's true. But that idea can be incredibly disempowering. So don't be surprised if you feel disempowered when you read the first half or two-thirds of the book. Keep reading. While McDonough and Braungart don't spend ages talking about starting points or concrete suggestions on how to achieve sustainability, you'll have hope by the end of the book. You might never look at recycling the same way, but you'll still have hope.
Let's talk about the physical manifestation of the book itself. It's made from synthetic 'paper,' made from plastic resins and inorganic fillers...according to McDonough's website, it was "designed to look and feel like top quality paper while also being waterproof and rugged." Well...it's pretty rugged (as it I don't think I'm going to rip a page at every turn) but it's not really 100% waterproof. A few of my classmates tried reading in the shower. Their books were still kind of soggy and the pages were rather sticky...so try it if you can't resist. But you've been warned.
All in all, I would definitely say add it to your reading list.