For a long time and painfully, they did research, as a result, they bought this vacuum cleaner for NG for my mother, since then it has been regularly used. For a one-room apartment, this is just an ideal option, the charge is enough for about 2 full cleanings (with furniture). We vacuum in a day or two, the dust does not have time to accumulate much, so everything goes easily and effortlessly. It is true that the nozzles are put on and taken off tightly, but not so much that it causes insurmountable difficulties. I am glad that there are at least no backlashes, well, we were lucky in terms of the absence of marriage.