My boyfriend found this book and, to be frank, I was sceptical, but he really wanted to lose weight and I was happy to do the diet with him. We have stuck rigidly to the fat burning weeks and haven't felt hungry at all. Plus the recipes are delicious and varied enough to keep our interest (plus you can substitute carefully - I don't eat red meat, so I have fish from the fat burner list instead).
The stabiliser recipes have been harder to keep to and sometimes less practical (for example, eggs florentine for lunch at the office, or 3 different types of bread in a week when you only need 1 slice of each loaf). We have just been sensible and tried to substitute approved foods or, if we've had something off the list completely - dinner out - we've done a fat burning day before or afterwards.
Our weight loss has been great (22lbs and 15lbs in 6 weeks) and we both feel and look much healthier. The 2 weeks fat burning, 2 weeks stabilising works really well, as we all have occasions when we can't completely control what we're going to eat (parties, dinners), so we've tried to ensure they're in a stabiliser week.
Some tips: a food processor helps with the chopping for the soup; buy a wide necked flask to take soup wherever you go; start exercising, the weight comes off even quicker (you don't have to sweat it out at the gym - get a good pedometer and do your 10,000 steps a day); we start the FB week on a Tuesday so the meat cooking days fall at the weekend when we have more time to cook breakfast (and it feels like you're having brunch!).