GamePro: "When Child of Eden debuted last year, it was viewed as a "Kinect game," and it's been joined at the hip with the motion sensor ever since (until the PS3 version comes out in the Fall, anyway). I've only played Child of Eden with Kinect in its final version, so I can't speak to any concerns other people have had with earlier preview builds or the like.
I can say, though, that I didn't have any significant problems playing the game with just my hands -- sweeping my hand around to lock-on to enemies didn't feel so laggy once I tweaked the sensitivity option, though my reaction time and my arms suffered as the intensity grew in later stages. It's still not the same as playing through with a controller first, which I strongly recommend. But I imagine that the people who will enjoy Child of Eden with Kinect the most will be owners of a giant TV or a projector."