I have not been fortunate enough to attend the RETSO conferences, yet.
However, I think it is a mixed bag.
If you are already in Real Estate business for a long time, chances are, this conference will be more like a 'basic' conference. Particularly for those who attend the annual events from their franchises like KW or Re/Max.
For those who are new to this business, may be, they will like it.
Overall, I'd say, a mixed bag.