It really does work. I bought the book and started one week ago today, and as of this morning, I have lost 10 pounds. I still can't get over it. I'm over six feet tall, and weighed in at 260 last week, and now I'm at 250.
I had heard about this diet only a short time ago from friends and coworkers, and everyone had something good to say. So-and-so lost 20 pounds, someone else lost 40...I figured I might as well give it a shot. I had decided to try eating better anyways, and had cut out the Coke and Pepsi drinking, so this would just be another step. I never would have guessed that my "better" eating was still causing me to gain weight.
This book is definitely worth it. Out of all the diets, supplements, pills, liquids, shakes, and foods I've ever tried, this is the only one that has shown me such a drastic result, all while still eating normal foods. The first week is certainly rough, as everyone seems to attest to. I had several headaches, a couple of bouts of nausea, and general crankiness, but once I found a well-rounded way to follow the recommendations of the book, I've been great.
I drink an Atkins strawberry shake in the morning (albeit, I add a few real strawberries in the blender for a better flavor) and a multivitamin, a normal lunch that consists of polish sausages, or taco salad (sans tortilla), or a big salad with sliced chicken, and have an equally filling dinner consisting of just about anything I can BBQ up. If you can handle giving up pasta, pizza, Coke/Pepsi, breads, and junkfood for a while, you can do it.
When you're ready to start the diet, prepare a grocery list of the low-carb foods that you like, and think about what combinations of food you can make that will offer you diversity in your meals. Part of my problem the first week was not having enough variables, and eating the same thing all the time. You can only eat so many omelets before it gets old. Prepare in advance.
If you're a snacker, prepare baggies of the snack items you can eat. Pack some sliced pepperoni, or some macadamia nuts, or sugar-free Jell-O. Now that I've found my balance, I can burn through my workday without feeling hungry, or pining for my next meal, all while keeping my carb intake well below 20g.
If you're still debating on the diet, just dive in. It's worth it to yourself and to anyone who cares about you. Stop wishing you felt better, or looked better, or weighed less. With this book, some good eating habits, and willpower to do it, you can lose weight.