We're on our third vac. First was a Neato, 2nd Ecovacs, current and best is Roborock Q5. One major requirement is the ability to draw virtual boundaries, rather than having to move things or manually block areas. The other is for it to return to the dock when the battery is low, and resume and finish automatically. This is needed for a larger floor plan. We had one that also mopped but it barely cleaned, not worth it. You also want it to connect to Alexa or a Google assistant, as well as an app on your phone. The one we now have is a keeper.
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