This is a book that is easy to read, great pictures with “how to do” details about each exercise. There are 3 program levels that last 6 weeks each. I started the week of Thanksgiving 2009. The workouts are hard enough to keep your heart rate in the fat burning to cardio range and with the warm-up/cool down take about 45-50 minutes. I have no doubt that I will reach my goal following this program and enjoy the process along the way. Even with my personal modification to this program, I have all ready lost 4lbs and a few inches. I think this is great considering we just went through the holidays where most people gain 5+lbs.