I heard it was a must do in Vegas. It was a great experience! I went on the zipline because I'm afraid of heights. I was still very nervous as I walked down the steps getting ready to take off. The staff was super nice and professional. They made me feel comfortable by trying to distract me with conversation :) I bought a ticket there so I expected a wait. The wait wasn't that bad, probably 30 minutes max at around 2 in the afternoon on Thanksgiving.
Next time, I would most definitely go on the higher zip line because it's longer and superman-style! The pictures were crazy expensive; I bought one for 20 but hey it's a tourist attraction. Nevertheless, it's definitely worth riding one time- I'm glad I didn't chicken out!