Being a small animal veterinarian I deal with many questions and issues regarding litter box use and maintenance. I talk about and recommend the Cat Genie on a weekly, if not daily basis. Our second Genie was installed in our basement to eliminate the two regular boxes that had been in use for 3 years. I can't lie and say there weren't any challenges while getting all 6 cats to convert to being totally "litterless" in the house. With some desensitization and treating the ones that were a little apprehensive we have now switched to using just the 2 Cat Genies and I could not be happier. I did have to purchase the side walls and dome separately. Thanks again Pet Novations!