yeah i've heard about the litter maid, but this ones different u can see it atwww.litter-robot.com
apparently i've heard that some people have had problems with the littermaid because its hard to clean , and sometimes it jams up with clumping litter. i also didn't like the litter maid too much because the fact its an open tray, and i prefered a closed tray where you couldn't see whats in it!
i'm thinking about getting a litter robot if its good (thats why i wnted to know if anyone tried it before) also i know you can get a self cleaning litter box called "litterfree" www.litterfree.com
i think. it washes the litter! but apprently its noisy and when it goes to dry the litter it smells...