From what I can gather you are paying to be trained and then would be an independent broker working under the WME banner. May not be a bad deal for what your are getting in knowledge. Especially if the cost covers air and hotel stay. I am consultant and trainer in another field and training is expensive.
That being said most of what they teach can be found through research on your own. The question becomes whether you want to pay for having it already compiled in a comprehensive learning package and having someone to answer questions. Whats your time worth to you?
One last concern would be whether or not you had to sign any type of work or broker agreement and the language it contained.