Hard disagree, because vacuuming is something you often need to do daily. Spending 10 min/day becomes over an hour a week. That's a significant chunk. If you have smooth floors, running a Roomba kind of becomes a no-brainer.
On the other hand, I only need to dust once a week, and that takes all of 10 minutes. Cleaning the bathroom is similarly once a week (assuming you wipe/brush the sink and toilet bowl as necessary after use).
Reducing vacuuming time, to me, is the #1 thing you can do to save cleaning time, if you live in a Roomba-compatible space.
