I tried twice to leave a review about this duster when it went on sale, but at that time all NOT laudatory reviews were deleted, now I see everything has changed, so I am writing again so that there is an adequate picture for this duster: After using the purchased Botvac D85 and comparing it with the existing Roomba 780, I came to the following conclusions: 1. The quality of cleaning is noticeably worse than that of my old rumba, if you take it on a 10-point scale, then rumba has 10, and a maximum of 7 will be scraped for a botvak. 2. Cross-country ability - rumba tank, tractor topcoat. On those carpets where the rumba calmly crawls and cleans, the botwak drags itself with all its might. 3. Cleaning - identical, I didn’t notice that the top coat was easier to clean, just like everything on the brush shakes. 4. What botwak is unconditionally the leader in is cleaning speed, 40 minutes versus 1.5 hours for rumba. But since the duster cleans according to the schedule when no one is at home, then this plus already, as it were, does not matter. 5. After a few days of use, the side brush of the botwak was already all tattered and lost its pile, the rumba still has the one that was from the store. 6. I note with sadness that I wasted 45 pieces in vain, since the rug that the rumba could not remove, the botvak does not try to clean at all. P/S. I note right away that if you compare the botvac with the rumba of the 8th 9th series, then the quality of cleaning will be identical, I took the rumba 980 from my sister and was surprised that the quality of cleaning is identical.