Here are a couple threads from when these models were previously available. I want a robot vac but everytime I go through the comments on one I come to the conclusion that the longevity and effectiveness isn’t quite where I want it. Yet.
https://forums.woot.com/t/shark-iq-robot-vacuum-w-self-empty-base/1007664
https://forums.woot.com/t/shark-robot-w-self-empty-base/860342