I know this looks disgusting, but here is the proof of the power of the Eufy. I have an Australian cattle dog that sheds like crazy and it shows on my dark hardwood floors. I run the Eufy every day and now not embarrassed if someone drops by unannounced. My floors are clean. I showed my aunt this weekend and she bought 2. The Eufy gets around better than the Roomba, doesn't get stuck under furniture and is quiet. I run it at 1 am and my floors sparkle when I get up. A must have if you have a dog. Best purchase ever!