Went once myself. The peer pressure is very effective. I made my taget goal and then quit. Didn't maintain the weight but if you did not quit, I'm sure that would be helpful in the maintenance phase as well.

__________________
Lots of people talk and few of them know, soul of a woman was created below

I can't get through to her 'cause it doesn't permit
But I'm gonna give her everything I've got to give.

I hear your sweet voice calling
out my name
As I stare from a six foot cell
And from beyond I heard the words
Deceptively Yours