Should I buy a combo vac-mop robot or separate vacuum and mop units?

Combo vac-mop robots save time on hard floors by handling both tasks in one pass, but they cost more than separates. Vacuum-only robots usually have better suction and longer battery life, and combo mopping is just a light damp wipe, not a deep scrub. If your home is mostly hard floors and you hate manual mopping, a combo makes sense. If you have carpet or want max cleaning performance, consider separate units.