Bought to replace REDMOND RV-UR380. Much lighter than it, even for a quick pass on the day of purchase, I collected dust by a third of the container. On the next pass, the next day, I collected almost a full container (at the same time, the charge was about half spent). So far so good, but we'll see how long it lasts. Some pros: Lightweight, collects quite a lot of dust, recharges at the station. Possibility to block the trigger. Cons: With a "smart" brush, you can not turn on the average power mode: only automatic, eco and turbo. It takes a relatively long time to charge.