I didn't like Ka. I saw it in Las Vegas a few years ago.
Originally we wanted to see O, but tickets were sold out. So we went to see Ka without knowing what it was. And I was so disappointed.
I think it's just a poor mix of Chinese stage fights. I really thought it wasn't worth the money. If I wanted see these, I could pull out any Chinese opera VCDs from my mom's collection.
I do admit that Ka is more than just stage fights, and the story wasn't that bad. But I think other Cirque du soleil performances would be better suited to my taste.
On the other hand, my husband, who didn't grow up watching Chinese opera, enjoyed it quite well, until the next year when I took him to a circus show in Shanghai, at least.