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Robot Vacuum Cleaner Reviews Robot vacuums tend to be less powerful than regular vacuums. They also to have smaller bins which need to be empty often. They can be caught on furniture legs or have to struggle to get around thresholds or stairs. Choosing a model with no-go zones on the app or physical barriers may aid in avoiding these issues. 1. They're More Efficient The most effective robot vacuums we have tested have impressive results on carpets with low pile, hard floors and sticky spills.