Earlier quoted context omitted.
I move my vacuum robot up and down stairs as needed. I'm not _quite_ lazy enough to buy a second one for upstairs (but I _have_ considered it, I use an inexpensive Chinese knockoff, not a brand-name-priced Roomba...)
Are the Chinese knock-offs any good? I just looked up the price of a Roomba. $600 AUD to start for the shittiest model :(
I had been hoping the Roomba would make my apartment and sweep it intelligently, but as near as I could tell, the Roomba just moved at random. I also found the power of the Roomba was weak. Inspecting my floor afterwards, I'd frequently find the same kind of lint, or detritus that made me want a Roomba in the first place.
Maybe I was just unlucky, or had a bad living space for a Roomba, but in my experience they aren't worth it at all.