I love these programs!!! They are both put out by a company called beachbody.com. I started at 155lbs and a size 15 when i started Slim In Six. I lost 10lbs and 22 inches in six weeks! I then jumped into Power 90 and lost 10 more pounds and 12 inches - putting me into a size 8!!! Im currently on my second week of my second round of P90 and loving it!!!!