We have had the Vorwerk for 7 years. We think this thing is great. However, for me it is clear that it does not replace the "normal" vacuum cleaner. A lot also depends on the circumstances. The less is lying around, the better. When used with children, there are pros and cons. Using it simultaneously in one room is not possible at all. Mainly because of toys on the floor and depending on the age, it is constantly turned on or off, chased, or people try to ride it. You have to search the floor for small toy parts before it runs; otherwise, they are gone or, depending on the size, the robot gets blocked. A big advantage for us is that you can let the thing run briefly every evening without much extra effort while you are in the bathroom with the kids or so. The battlefield of dinner crumbs on the floor is quickly cleared up. And if you have little Tasmanian devils at home, they naturally kick up much more dust. Under the stairs, within one day, you already have the first wool mouse embryos. Conclusion: Especially with children, no longer without it, but it does not replace the normal vacuum cleaner.