Help me

Hi! I have three cats whom poop every five seconds it feels like. My neighbor just bought her (one) cat a litter robot 3 and it’s incredible. The amount of info I’ve read and the gadgets and gizmos is overwhelming. Tell me everything you love everything you hate about your literrobot & which one you have. Did you buy it new? Used? We’d be going from purina tidy cat (breeze) system. Is going from two litter boxes to 1 robot okay? I want the simplicity of a robot because I’m tired of scooping🤣