Watch Le Reve. If you only have time to do one thing in Vegas, make it watching Le Reve. You won't be disappointed. Sit near the top or middle. You don't want to be too close to the stage.
I've seen Le Reve twice and would watch it again! Acrobatic-Aquatic-Dramatic-Magic-Dance Show! Not a bad seat in the house since it's a circular theater.
Set in a one million-gallon water capacity theater, no seat is more than 40 feet from the stage. Each cast member must become scuba-certified before performing. "Le Rêve" means "The Dream" in French.