CFS from what I hear is the party. I looked at the agenda a few times and it looked like a 3 day long ELMS class, a few panels but mostly presentations of things you get in recurrent training. Unless your a hardcore aviation nerd I don't know who would want to sit though that. The parties at night must make it worth it. Don't they give you bracelets they scan or whatever to make sure you attend the presentations and don't just party? NATCA in Washington I hear is a lot more hands on and more work. Parties the first and last night too but meeting you have to prepare for and be tactful enough to get the point across. That seems like it would be more fun, more of a balance of potentially meaningful work and drinking.