Any body else doing The Tracy Anderson Method or Tiffany Rot

I wonder whether I am the only one, and if I am not, is there a link to a group, I'm not quite sure how those group works, but I can guarantee I'm obtaining great results in less than three weeks doing both! my waist looks a lot slimmer and in fact I even lost inches of waist and tummy (navel area), and even from chest and thighs.. so I would like to know if anybody else is working out with them and which results they are getting