Jewish? what do you think about the kabbalah center?

is that true kabbalah? why do people think they have found the inner peace in that center? where do they get the 72 names of God? why do some rabbis say kabbalah is only for men and they must be jew and to be 40 years? what is true kabbalah the kabbalah center by Michael Berg or Bnei Baruch or something like that