Hopefully not the one with cameras that’s sending imagery of your home up to the cloud.

Bought a Roborock and expected it to be ”meh” at cleaning but it does vaccum better than I would (and can do it more often). Had no problems with it so far.

The data you upload to somewhere in your own country is much more dangerous as a recipient may actually reach you. Uploading your data to China? Much higher probability it is inconsequential.

Do they run without set up? What are some useful tricks?

A few years ago, I bought a Eufy robot vacuum. Less than a year later, one of the wheels stopped working: a known issue caused by faulty gears. When I reached out to Eufy, they told me the product had been discontinued, no parts were available, and they wouldn’t honor the warranty. So be careful with them.