I saw KA this past weekend and had a great time. Knowing I was going to visit Vegas I debated between all of the Cirque shows. My final picks were between KA and O. I didn't want to splurge so much on tickets, so I opted for the less expensive of the two. I had concerns about why it was significantly less expensive and so many people we spoke to in Vegas recommended O. I'm sure O is spectacular, but you won't be disappointed with KA. ITS EYE CANDY!!!
When comparing the two from reviews, most people indicated how KA has a story line. This threw me off- I kept thinking it would be more of a Broadway show type. The "story line" is pretty insignificant....so don't let this deter you! I did have moments where I was trying to make sense of the act (where does this fit into the story), but knowing what I know now......don't bother trying to read between the lines. It's all artistic expression- just sit back and enjoy!
Also- don't break the bank trying to sit in the lower section. In fact, I sat in 201 and I would have to say this section would be the best for viewing ALL of the action. The theater is small enough so anywhere you sit you will be OK. The mechanics of the stage, costumes, and visual effects are well worth the visit.