I attended one and was impressed by exactly what Ed was saying, networking like the Chamber or Rotary. I've attended lots of the Hype presentations and learn a lot. The problem is that you don't know the truth from the con game (as Jim informed me). But if you trust but verify, it is very worth your time. Give it a try.
Even a MLM company is positive if it makes you happy for getting the support that you wouldn't get otherwise. I don't think you can make money with most MLM situations but isn't the time you invest better than the time going to a depressing support group that will just bring you down?