Clean base with recharge? It works good and I don't mind changing the bases vacuum bags. The vacs rollers, corner dust whirligig, internal vac filter, and sensors do need occasional maintenance which I don't mind as long as it doesn't involve software or firmware issues. I've noticed significantly less dusting of house since I started using my I7 Roomba. I do wish the made furniture specifically for robot vacs so they don't occasionally get stuck imo worst was when I built a new countertop at cabin put in barstools for a while it would get stuck on stool bases. But I feel it learned, and doesn't do it anymore.