As far as I know the "vibration machine" does not make you lose any fat. The Powerplate (what the proper thing is called) is a machine used by many physio's for rehab of patients. The Powerplate is supposed to build muscle faster than conventional weight training as it is not heavy on joints etc and it is a very concentrated workout. I have seen many bodybuilders training small muscle groups such as calves on this machine because its rumoured to build a few times faster than weight traing.