Ever thought of getting one of those robot vacuum cleaners? Behold my unsolicited opinion:
don't bother.
You're better off getting one of those nifty, light "stick" vacuum cleaner. A lot more fun and less time consuming than chasing a silly robot that gets stuck everywhere and sends a map of your home to some company.
If you want a brand, we really like our second-hand Electrolux ErgoRapido, but we haven't researched anything about it's longevity and repairability, so be better than us.