Do not get limited view seats to that show. I had them and you miss a huge amount of the "O" experience.
But if it is the only option left, as it was for me, then you might as well go.. but, Mystere at Treasure Island is a much better Cirque show. It puts "O" to shame. I have seen Cirque 5 times live (#6 coming up in a few months!!!) and Mystere is my second favorite show to see live, second only to the newest production of Verikai (spelling error).
"O" is more of a big budget block buster.. tons of expensive special effects but not really the soul of the other shows. Mystere is not as appreciated as "O" but it is a much better show.