This review is about the observation deck: I know everything is ridiculously expensive in Las Vegas but I thought $25.00 per person is pretty steep. We used Groupon and got our tickets for $15.00 each. Score!
Don't get me wrong, the attraction is awesome. Being over 500-feet off the ground gives you a fantastic view of Las Vegas and the surrounding cities. I believe the attraction is more expensive at night for obvious reasons. You could also time it so that you can see the water show at the Bellagio, which comes on every 15 minutes. The attraction is not more than 20-30 minutes.
Warning: If you have any fear of heights, do not go on this ride!