I have been hesitating to buy a robot vacuum. I once heard someone said those robots that do mapping cannot run when it is dark. But i plan to run it at night. What choices do i have?

Thanks. Only Neato, Roborock and Picabot use laser? Any other brand can consider?

Thanks but this one ship from overseas. Local after sales support is important for less hassle use. I read that some people have to throw away products bought from overseas because it is too much a hassle just to arrange to send back to those country for service. I think i'm going to keep my eyes on those with official local distributor.