I love this show so much I saw it twice. It's just as good the second time. It's absolutely beautiful and stunning. I have never seen anything quite like it. The stunts are truly amazing and the execution of the performers is flawless. It's almost hard to believe that people are doing what they are doing, and that it's all real. The contortionists are beyond belief. The colors and visuals are breathtaking. The show has a distinctly dreamy and surreal feel. The use of water in the show is great.
My only complaint is the clowns. I really do not enjoy the cheesy clown humor, and could totally do without it. I would prefer the show cut the clowns out entirely even if it makes for a shorter show. I guess the circus always has and always will have clowns, but for a visually stunning production like O, I feel clowns are irrelevant and out of place. Compared to the crazy and thrilling things the other performers are doing, the clowns kind of are a reminder of boredom and reality.
At any rate, it's a great show. It is expensive, but it is worth the money.