They took it to replace an old rumba, which was even without navigation, went chaotically. It is noticeable that now technology has stepped far forward. Roomba s9+ is completely self-contained. After turning it on, you just need to follow him so that he draws up a map of the room (at this time he can still get confused and drive uncertainly), and then set the cleaning schedule in the application, choose a convenient time and practically forget about the robot. It will turn itself on, vacuum itself and get rid of garbage) Once every few months at the self-cleaning station, you need to change a disposable bag and that's it. I also like that it looks good, they worked on the design of iRobot. For this a separate plus)