I've been twice in three years. Don't know why I went back the second time... Maybe the location sucked me in.
It's a complete waste of time, with second rate presentations, few meaningful booths for pilots to visit, and few aircraft on display.
Oh, don't forget how expensive it is!!! Food, hotel, airfare... Zow!
Nope, unless someone puts a gun to your head, skip it! Head to NBAA in Orlando this October.
FR