Reading all these rave reviews, I bought the book, and I have to admit I was quite torn---between being pulled in and dragged down. Why? Let me explain. ;-)
When I became a freelance copywriter, I checked out every useful book and article on writing techniques I could lay my hands on, and for direct response marketing, I got thoroughly enchanted by Joe Sugarman’s "Advertising Secrets of the Written Word."
Now, Maria Veloso’s definitely good at what she does, and good at how she teaches what she does: applying direct response writing techniques to the Internet. There are some drawbacks, though. You're pulled in into the realms of thrilling writing techniques, but also deeply into the hyperbole world of dramatic sales boosts, incredible cost cuts, the truth about hair growth, weight loss, and killer marketing secrets "they" don't want you to know about---so much so that at some point you begin to feel like wanting to come up for some air. "Air" meaning two things: transforming and applying these techniques to, how should I put it, more "upmarket" products and services, and a bit more reflection on the ethics of writing than just mentioning it from time to time. If you think you can't merge killer writing techniques with upmarket products and lots of ethics into the bargain, then I urge you to read Sugarman!
Another drawback is, with the way Veloso presents her techniques, the danger of spawning legions of "copy clones" looms large. Try and check out her reference Web sites, the testimonials' Web sites, and the copywriters' Web sites who apply her techniques, and you'll see how important it is to _not_ simply take these techniques as a ready-made formula to build your house of words. (That doesn't mean that the real good examples aren't real good, mind!)
I'd say, yes, do buy the book. But be ready for the hard work to develop your own ideas, to build on these techniques, and to apply them for your customers in ways that look authentic, feel genuine, sport less hyberbole, and comply with your ethical standards.