Travelzoo & SmarterVegas had this promotion for 25% off O, using the code "Bellagio"! It was one of the few times I had actually seen discounted tickets for O and was enticed to book tickets for my most recent Vegas trip.
I booked 2 ish weeks before the show, and found the only several pairs of available seats to be in the Upper Orchestra or Balcony. I figured, since I'm already paying $95+ for balcony seats...why not splurge and get better Upper Orchestra seats for $20+ per ticket. Our seats were near the back of the Upper Orchestra but we had very centered seats (bonus).
I also found out that Cirque du Soleil releases show tickets 4 month in advance (so if you ever plan to watch another Cirque du Soleil & there's incentive like discounted tickets - you should definitely hop on that wagon before seats start running out).
The show was very audience friendly/interactive and funny. Most of the audience gave the acrobats a standing ovation. There was a little kid sitting behind me, laughing throughout the show [I find out at the end, he fell asleep LOL]. Exiting the theater was a hassle/mess, it was so packed!! It took forever, next time I will just sit and wait til the crowd disperses.