Ummm I was there one year ago, and the whole place is a giant rip-off. First of all, you have to navigate about 30 miles of an unpaved, pockhole filled,very skinny mountain road. It takes at least an hour to get there when you get off the main road. When you get there, you really can't see much of the canyon, but they are willing to sell plenty of $75 dollar helicopter rides. I don't think the skywalk is going to make it any better.
ME! One word: Weightlesness. Ok one more word: Floating.