Well, I'm speaking at it, and I can tell you that I am giving the best knowledge I possess.
I say that while being about 2 weeks over due on my presentation!
I'm listed under the rehab section.
Based on what I have seen of his in the past, and the list of speakers he has lined up for this, I would say that it is probably money well spent. I go to a lot of fitness conventions and shows though, so I am pretty accustomed to shelling out money to improve my business.