I purchased this book on the suggestion of a friend. I'm a 28 yr old male, 5'10" and started at 251lbs. Clearly I had a lot of weight to lose and it was time to stop putting it off. The program consists of three-17-day cycles followed by a maintenance plan. The first cycle is clearly the hardest and is somewhat of a cleanse, although the ability to eat unlimited veggies and lean meats meant that this isn't your typical starvation/crash diet.
I will admit, the first two days were rough. Even though I was eating tons of chicken and turkey, I had hunger sensations for about 48-hrs. After that my body adjusted and it was very easy to stick to the diet. My wife and I both committed to following the program to a tee, and it helped that we had each other to keep each other honest and not cheat. To be honest, once I saw how quickly the pounds started falling off, no craving could overcome my desire to reach my goal.
I am currently on cycle 2 and 21 days into the diet. I've lost 19lbs and it's noticeable on my face and waistline. I have tons more energy and I'm enjoying life more than I used to. In those 21- days, I haven't even stepped foot in a gym, just 17min of walking a day. The only downside is that now when I put a suit on for work in the morning, I look like a child wearing his father's clothes.
Buy the book, don't make excuses as to why you can't give up certain foods for a month, and watch the pounds fly off. It works, it's done in a healthy and safe manner, and you won't regret it!