A Roomba. It was on sale, crazy cheap- like 50%off. I bought it. We have an open floor plan and linoleum floors. It’s so amazing. Our living room furniture is elevated enough that it fits under the couches. We have 4 cats that shed like crazy, but there is never hair or litter. Every day it vacuums the 1st floor and has been such a time saver.
10/10 would buy again- and we did. Got one for the 2nd floor and purchased an older model for each of our immediate family for x-mas.