I love my cat genie. I just wish the cartridge's were cheaper or shipping was free and quicker. After you figure in shipping costs with the cost of the cartridge you are paying about the same as you would for cat litter just with less work. However if you forget to have a backup cartridge you either pay lots in shipping to get the cartridge here in a couple days or wait for regular shipping. Either way you have no cleaning cartridge for you cat genie and then it's pretty useless until you get one. The price needs to come down about 15% and lower shipping charge or come down 10% and give free shipping and then this would be a great price and great value.