I've considered going there once or twice but the hotels were ridiculously expensive. It was around €200-250 a night, for me that's way too much. And the travel on top of that (i don't drive and live in southern Europe so I make less than most Germans). And I'm too old for shared room hostels. Here in Spain I can get a 4* hotel for 70€ most of the time.
It's a bit similar to DefCon in that sense. Except that it's held in real cities and not a casino resort.