My brother has a new house that's almost entirely one level and tile floors with just a few throw rugs. He really likes whatever robot vacuum he has. I've looked at them but I have a bunch of level transitions, always have various stuff in piles, etc. Last time I looked, I decided to get a cordless Dyson instead. I just pull it out, do a quick vacuum of high traffic areas, and put it away. Takes me 5 minutes--and totally solved the problem of my kitchen especially getting dirty between the times my housekeeper comes.