In an ideal world, you’d clean your floors every day, staying ahead of dust and grime and watching your home transform into a spotless, sparkling palace. We live in the real world, though, where a host of other household responsibilities and chores vie for our attention.The newest robot mop-vacuum combos are designed to bridge the gap. And as long as you set your expectations accordingly (these things aren’t miracle workers), a good robot mop-vac combo can handle day-to-day floor cleaning with consistency and aplomb.After testing a range of models priced between $400 and $1,600, we think the Narwal Freo Pro offers the best combination of performance and value.