We got a Eufy Robovac 11, which is basically the same original design but with slightly different customizations. For <$200 shipped we LOVE IT. Robots in this price range don't have fancy things like room tracking but seem to do a decent job with randomly traversing a room and flipping among spot, corner, and full room modes until the battery runs out. The parts are cheap to replace, the bin is easy to clean, it's quiet, has an IR remote to navigate it wherever, and the battery lasts 30-45m depending on how thick the carpet is or over an hour and a half on hardwood floors.
Is it as powerful or thorough as a normal vacuum? No. But you know what? It's way easier to just press a button and have it do a quick cleaning while I go do other stuff. Because of that, the floors get cleaned way more often than if I had to lug the big vacuum out and do it all myself. It's a great maintenance vacuum but you're still going to do the actual spring cleaning.
Five stars, would buy cheap knockoff Roomba again.