We had free tickets with free drinks. I'm glad I went, but I'm also glad I didn't pay for it.
You go up really high. Since it's behind a lot of big, tall buildings, some views are very limited. If you want a view, the Stratosphere tower is better. There are other good views of the Strip (many hotel rooms with Strip views, Voodoo Lounge, Ghostbar, Foundation Room)
I can understand how people from small towns who've never been above 5 stories in a building would be "amazed" by going up 550 feet.
How much it's worth will depend upon how much you value being 550 feet above the backside of the Strip.