I too love my Cat Genie...so much so that I have two. But I have also had issues with both the spindles breaking and also with smaller particles being left behind in the bowl. And if it's waste matter, it's a very unpleasant odor when it hits the drying cycle. There's no mistaking the smell.
I wonder if they could make a scoop with graduated openings or with more of a curve to be sure to catch all the solid waste better.