I haven’t seen one of these in action, but I like the concept. If Roomba is basically a robotized electric broom, Mint is a robotic answer to a Swiffer. It has a dust pad on the front. I have an open foorplan in my house and all hardwood floors, the perfect environment for Roomba and Mint. Where Roomba uses a random wander and some set patterns, Mint uses a ceiling navigation scheme (where a pattern is projected on the ceiling that it follows). I have not been very impressed with these navigation schemes in consumer robots so I wonder how well the Mint performs.