I've been using for a month now. I expected that 40 minutes of work would be enough for one piece, but only these 40 minutes of work are possible without the use of electric brushes. And in the kit there is no usual wide nozzle without a drive for the floor, unfortunately. With a drive brush, it discharges before our eyes - it lasts for 15-20 minutes. It's a disaster, I think. I wanted to take a 10 or 11 model so that the working time was with a margin, but they were not available. This one would rate 3.5/5