Since I was in Vegas for a week, Ihad to check this place out. Just like everyone else has already said it is smaller then you would think, and it gets crowded quick. I you don't get there kind of early in the day then expect to be standing in line for a little bit just to get in.
That being said, it is 100% worth your time to go check it out. They have even more cool things in the store then they show you on TV. It was almost like being at a museum. They had a lot of classic art, a $13,000+ coin, awesome old guns, and a early Indian Motorcycle.
It would have been cool to see some of the guys from the show, but seriously there were so many people that if I was them, I would hide in the back too. Go check it out and buy something.