If you never want to scoop cat "material" again, this is the way to go! It is exactly what it claims to be! I have a 120 and I'm getting another one!! I love the whole concept of the self-flushing and self-cleaning litterbox. No other auto-scooping litterbox finishes the job including ridding your home of the smelly mess!! :) The maintenance package (a special envelope of cleaning solution) also works great - I'm looking forward to trying the new cartridge for maintenance. This company keeps improving it product and has built a large community of devoted users - Keep It Up, CatGenie!!