They took to replace the very first and simplest irobot roomba 521 - for 10 years he got tired of cleaning and was sent to retire, but not to the trash))) - as he can work in the country, the requirements are softer there. There is one caveat - it is not suitable as the only vacuum cleaner. We have 2 more household ones - a wired economical, extremely quiet and very powerful EIO VARIA with dyson nozzles for rugs, rugs and upholstered furniture and a wireless, manual Chinese with a cyclone for prompt cleaning of small debris that the robot will not immediately remove and for cleaning the car interior. There is also 1 industrial one (mega-powerful, without a bag, with cleaning liquids, large debris during repairs and general cleaning at home and in the country). As a result, each performs its function. The robot is needed to constantly maintain a clean floor day and night. When roomba "fell ill", very quickly discomfort began to be felt underfoot - small pebbles from shoes, pellets from cat litter, crumbs in the kitchen, crab food - which had to be cleaned daily. But getting used to the comfort that does not require investments, you no longer want to spend time on it and even think about it. Bought at a discount for 6tr and everything fell into place !