This is a really nice addition to the CatGenie. It does help keep down on some of the tracking of the granules. However, it does work better if your cat will allow for the dome to go over top. Before I got these sidewalls my kitties would scratch out more of the granules. But once I got these, it made it some better. I still have a problem with my kitties running from the litter box after they use it, LOL!! My husband & I always get a good laugh when they come flying out of the laundry room after they've used their litter box. They did it with their old litter boxes too, so its not just the CatGenie they do it with. I think they just don't like the smell of themselves going potty :) So when they do this, they tend to pull more of the granules out with them. But these sidewalls are well worth the purchase.