Well I think they are one of the most reputible weight loss "groups" going, it's more a support /info group which cost next to nothing. Why do I know this????
My Mom has been a Tops/Kops member for more than 30 years, she lost about 40 pounds with them, and goes now more for maintanace. She is 83 years old and has tons of friends she met through the 3 different chapters she has belonged to. I know there is one lady at here group that is following Atkins.

Good Luck Kathy