[philoret]

20 years user and contributor to robotreviews.com with engineering info, repairing bots etc. I prefer the Samsung vacs for more reliable electronics from major supplier, and the iLife W400 Shinebot mopper with water extraction, rotating brush instead of just mopping pads. Samsung also more powerful suction useful for carpets. I spoke on this industry technology at The Villages science club. The newest models have self-empty, separate vac charging bases with large bins, expensive, and camera vision of floor avoiding obstacles and obstruction. Wide range of prices and features in this industry. Caution Neato Robotics, bought by German appliance co. some years ago, is closing with support next four years only.
Amazon had tried acquiring venerable iRobot (Roomba brand) but blocked by regulators.
Which bot to use depends on flooring and furniture obstructions. Carpets need more than hard floors.
Best to buy where can be returned if doesn't work out in your premises. Various tricks can be used to assist with furniture, see robotreviews.