I only used this book for the exercise portion, so I can't comment on the diet portion. But this book is well worth the price for the workouts alone! Once I really followed the workouts schedule as prescribed, I dropped a size in about 6 weeks after a really long plateau.

I disagree with the posters who complain this is too basic, or there is nothing new to learn. The exercises may not be complicated, but that does not mean they are not effective. I had spent over 2 years with a trainer doing weight workouts, but this workout on my own helped me drop another size after I stopped working out with him.

The magic is in the way she composes the workouts. The workouts are amazingly effective if followed the way she lays them out. The combination of lifting with short bursts of cardio really firms up your muscles while burning fat. This type of workout produces more of a leaner/sculpted look, it's not intended for building mass or bulk.

This book kick major butt. So if don't want to be kicked into gear, than don't get this book. Very hard.

If you're serious about losing weight this is the book for you. This book will get you where you want to be if you're serious about it. This is not a quick fix fad diet. Jillian really knows her stuff. I had lost 54 pounds on my own, but the weight stopped coming off and I still had a lot to lose. And I wasn't exercising either, so I wasn't in shape. After doing what she says the weight continued to come off. And the exercises have toned up my muscles and even made them stronger. Lose weight look great and feel great with Jillians book. A must read.