I really like this book. It's not about DIY per se, nor decorating, nor Grand Designing your home. (So if you bought this book expecting that...well...um, perhaps a little investigating beforehand might be useful next time.) It's about what it says on the front cover: Kevin McCloud's 45 Principles of Home. It's a philosophy, a way of looking at Home, how we make a Home, how we feel about Home, how we live in our Home. I like especially the philosophy that there's no such thing as an eco-home, but simply an eco-way of living, that it's not what we're living in that matters, but how we live in what we have.
I must admit I didn't expect the book to be amusing, as well. (McCloud's description of trying to set a bale of hay on fire had me giggling throughout.) That's a bit of a plus. And the design of the book is really truly good, which is encouraging and shows McCloud's publisher going out on a limb to follow McCloud's principles for his book. (I am particularly pleased with the citations being in the margins of the book, rather than at the end.)
Another reviewer said they found some of the insights to be "insulting", by which I assume they mean "simple" or "basic". I have no problems with that. For some people, they will be new, and I think McCloud was more interested in completeness of philosophy than making sure he wasn't insulting someone's assumed level of experience and knowledge. People have to start somewhere, after all.
All in all, I've really enjoyed reading this, and am already recommending it.