Let me preface this by saying that I have never owned another robot vacuum before, so I have nothing similar to compare it with. That being said, this vacuum is very small. I turned it on, and it started moving around my tile floor. While it struggles to pick up large crumbs and things like cereal, I was actually surprised it had picked up anything. When I opened it up, there was dirt and hair inside... you know, the stuff you can’t necessarily see.
Overall, this might be an option for someone who just wants a light dusting of their floor, and have bragging rights that they have an actual robot cleaning up after them. For the rest of us, it is too loud for its size and doesn’t work well.