Saw Ka with DK in Las Vegas. I was afraid it would basically be an apparatus/scenery-driven show, but was pleased that it was better than that. In particular, the duo strap act in the second half was quite impressive, as was the big spinning apparatus act. In addition, the moving stage platform that went towards vertical (and was covered with arrows and ripples) was a platform for engaging acts. While quite simple, the bird puppetry was lovely. I wasn't quite as taken in as other Cirque du Soleil shows, but was not disappointed, either.