PCWorld tested the $1,500 Narwal Flow 2 robot vacuum/mop against eight challenging messes including raw egg, olive oil, coffee spills, and mud to evaluate its premium cleaning capabilities. The device excelled at tough stains by intelligently switching between vacuum and mop modes, effectively cleaning most spills with minimal residue remaining. Despite strong overall performance, the Flow 2 struggles with grout cleaning and requires weekly maintenance to prevent odors from improper drying. If a job is worth doing, it's worth doing right--and if a robot is going to clean up my place, it better do a good job. That's the stance I took when Narwal sent me its luxury Flow 2 robot vacuum/mop.