I went once. It was the dead of Winter there and we had to drive a few miles from our hotel in bad weather each day to reach a crowded parking lot that was mostly on wet dirt piled with snow. It was hard to find a place to park and even harder to get out afterwards.
Inside it was like a three ring circus with all the stuff going on. The Expo itself was on one floor and the action room was in the basement. I bought a couple of things and was challenged to play a game where all the balls are racked in a circular pattern and you must stay inside the circle and make them all without missing to win. Anyone doing it would win a free set-up for playing the game. I watched a couple of guys try it and then they asked if I wanted a turn, so I said sure, why not. I did it successfully on the first try and they asked for my address where to send it and I gave it to them. I'm still waiting fifteen years later for it to arrive and when it does I plan to go back.